Finding the Fourth Proportional to 149,385.86, 206,149.82 and 81,403.42

Step by Step Solution

1. Step 1: Write the proportion equation
   149,385.86 : 206,149.82 = 81,403.42 : x
2. Step 2: Convert to fraction form
   149,385.86/206,149.82 = 81,403.42/x
3. Step 3: Cross multiply
   149,385.86x = 206,149.82 × 81,403.42
4. Step 4: Simplify right side
   149,385.86x = 16,781,300,380.38
5. Step 5: Solve for x
   x = 16,781,300,380.38/149,385.86
6. Step 6: Final answer
   x = 112,335.27