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Finding the Fourth Proportional to 56,609.62, 78,121.46 and 31,118.60

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Solution

The fourth proportional to 56,609.62, 78,121.46 and 31,118.60 is: 42,943.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,609.62 : 78,121.46 = 31,118.60 : x
  2. Step 2: Convert to fraction form
    56,609.62/78,121.46 = 31,118.60/x
  3. Step 3: Cross multiply
    56,609.62x = 78,121.46 × 31,118.60
  4. Step 4: Simplify right side
    56,609.62x = 2,431,030,465.16
  5. Step 5: Solve for x
    x = 2,431,030,465.16/56,609.62
  6. Step 6: Final answer
    x = 42,943.77

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