Finding the Fourth Proportional to 271,089.90, 406,563.72 and 81,499.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,089.90 : 406,563.72 = 81,499.50 : x
2. Step 2: Convert to fraction form
   271,089.90/406,563.72 = 81,499.50/x
3. Step 3: Cross multiply
   271,089.90x = 406,563.72 × 81,499.50
4. Step 4: Simplify right side
   271,089.90x = 33,134,739,898.14
5. Step 5: Solve for x
   x = 33,134,739,898.14/271,089.90
6. Step 6: Final answer
   x = 122,227.87