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Finding the Fourth Proportional to 256,404.07, 384,652.58 and 128,387.11

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Solution

The fourth proportional to 256,404.07, 384,652.58 and 128,387.11 is: 192,603.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,404.07 : 384,652.58 = 128,387.11 : x
  2. Step 2: Convert to fraction form
    256,404.07/384,652.58 = 128,387.11/x
  3. Step 3: Cross multiply
    256,404.07x = 384,652.58 × 128,387.11
  4. Step 4: Simplify right side
    256,404.07x = 49,384,433,100.24
  5. Step 5: Solve for x
    x = 49,384,433,100.24/256,404.07
  6. Step 6: Final answer
    x = 192,603.94

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