Finding the Fourth Proportional to 271,087.01, 406,078.29 and 128,500.10

Step by Step Solution

1. Step 1: Write the proportion equation
   271,087.01 : 406,078.29 = 128,500.10 : x
2. Step 2: Convert to fraction form
   271,087.01/406,078.29 = 128,500.10/x
3. Step 3: Cross multiply
   271,087.01x = 406,078.29 × 128,500.10
4. Step 4: Simplify right side
   271,087.01x = 52,181,098,842.44
5. Step 5: Solve for x
   x = 52,181,098,842.44/271,087.01
6. Step 6: Final answer
   x = 192,488.38