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Finding the Fourth Proportional to 1,318,773.05, 1,978,137.96 and 420,202.65

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Solution

The fourth proportional to 1,318,773.05, 1,978,137.96 and 420,202.65 is: 630,297.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,773.05 : 1,978,137.96 = 420,202.65 : x
  2. Step 2: Convert to fraction form
    1,318,773.05/1,978,137.96 = 420,202.65/x
  3. Step 3: Cross multiply
    1,318,773.05x = 1,978,137.96 × 420,202.65
  4. Step 4: Simplify right side
    1,318,773.05x = 831,218,812,857.59
  5. Step 5: Solve for x
    x = 831,218,812,857.59/1,318,773.05
  6. Step 6: Final answer
    x = 630,297.09

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