Finding the Fourth Proportional to 271,238.86, 406,811.85 and 71,561.31

Step by Step Solution

1. Step 1: Write the proportion equation
   271,238.86 : 406,811.85 = 71,561.31 : x
2. Step 2: Convert to fraction form
   271,238.86/406,811.85 = 71,561.31/x
3. Step 3: Cross multiply
   271,238.86x = 406,811.85 × 71,561.31
4. Step 4: Simplify right side
   271,238.86x = 29,111,988,909.52
5. Step 5: Solve for x
   x = 29,111,988,909.52/271,238.86
6. Step 6: Final answer
   x = 107,329.71