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Finding the Fourth Proportional to 3,558.76, 5,338.98 and 1,218.88

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Solution

The fourth proportional to 3,558.76, 5,338.98 and 1,218.88 is: 1,828.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,558.76 : 5,338.98 = 1,218.88 : x
  2. Step 2: Convert to fraction form
    3,558.76/5,338.98 = 1,218.88/x
  3. Step 3: Cross multiply
    3,558.76x = 5,338.98 × 1,218.88
  4. Step 4: Simplify right side
    3,558.76x = 6,507,575.94
  5. Step 5: Solve for x
    x = 6,507,575.94/3,558.76
  6. Step 6: Final answer
    x = 1,828.61

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