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Finding the Fourth Proportional to 259,491.51, 389,234.93 and 81,998.55

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Solution

The fourth proportional to 259,491.51, 389,234.93 and 81,998.55 is: 122,997.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,491.51 : 389,234.93 = 81,998.55 : x
  2. Step 2: Convert to fraction form
    259,491.51/389,234.93 = 81,998.55/x
  3. Step 3: Cross multiply
    259,491.51x = 389,234.93 × 81,998.55
  4. Step 4: Simplify right side
    259,491.51x = 31,916,699,459.36
  5. Step 5: Solve for x
    x = 31,916,699,459.36/259,491.51
  6. Step 6: Final answer
    x = 122,997.09

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