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Finding the Fourth Proportional to 257,286.64, 355,081.86 and 148,395.28

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Solution

The fourth proportional to 257,286.64, 355,081.86 and 148,395.28 is: 204,800.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,286.64 : 355,081.86 = 148,395.28 : x
  2. Step 2: Convert to fraction form
    257,286.64/355,081.86 = 148,395.28/x
  3. Step 3: Cross multiply
    257,286.64x = 355,081.86 × 148,395.28
  4. Step 4: Simplify right side
    257,286.64x = 52,692,472,037.62
  5. Step 5: Solve for x
    x = 52,692,472,037.62/257,286.64
  6. Step 6: Final answer
    x = 204,800.65

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