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Finding the Fourth Proportional to 391,281.58, 586,906.94 and 138,551.86

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Solution

The fourth proportional to 391,281.58, 586,906.94 and 138,551.86 is: 207,822.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,281.58 : 586,906.94 = 138,551.86 : x
  2. Step 2: Convert to fraction form
    391,281.58/586,906.94 = 138,551.86/x
  3. Step 3: Cross multiply
    391,281.58x = 586,906.94 × 138,551.86
  4. Step 4: Simplify right side
    391,281.58x = 81,317,047,063.02
  5. Step 5: Solve for x
    x = 81,317,047,063.02/391,281.58
  6. Step 6: Final answer
    x = 207,822.32

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