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Finding the Fourth Proportional to 98,991, 136,614.10 and 54,279

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Solution

The fourth proportional to 98,991, 136,614.10 and 54,279 is: 74,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,991 : 136,614.10 = 54,279 : x
  2. Step 2: Convert to fraction form
    98,991/136,614.10 = 54,279/x
  3. Step 3: Cross multiply
    98,991x = 136,614.10 × 54,279
  4. Step 4: Simplify right side
    98,991x = 7,415,276,733.90
  5. Step 5: Solve for x
    x = 7,415,276,733.90/98,991
  6. Step 6: Final answer
    x = 74,908.60

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