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Finding the Fourth Proportional to 91,776.24, 137,678.76 and 39,186

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Solution

The fourth proportional to 91,776.24, 137,678.76 and 39,186 is: 58,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,776.24 : 137,678.76 = 39,186 : x
  2. Step 2: Convert to fraction form
    91,776.24/137,678.76 = 39,186/x
  3. Step 3: Cross multiply
    91,776.24x = 137,678.76 × 39,186
  4. Step 4: Simplify right side
    91,776.24x = 5,395,079,889.36
  5. Step 5: Solve for x
    x = 5,395,079,889.36/91,776.24
  6. Step 6: Final answer
    x = 58,785.15

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