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Finding the Fourth Proportional to 257,786.16, 386,832.33 and 139,454.88

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Solution

The fourth proportional to 257,786.16, 386,832.33 and 139,454.88 is: 209,265.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,786.16 : 386,832.33 = 139,454.88 : x
  2. Step 2: Convert to fraction form
    257,786.16/386,832.33 = 139,454.88/x
  3. Step 3: Cross multiply
    257,786.16x = 386,832.33 × 139,454.88
  4. Step 4: Simplify right side
    257,786.16x = 53,945,656,160.27
  5. Step 5: Solve for x
    x = 53,945,656,160.27/257,786.16
  6. Step 6: Final answer
    x = 209,265.14

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