Finding the Fourth Proportional to 120,255.72, 165,941.59 and 81,414.53

Step by Step Solution

1. Step 1: Write the proportion equation
   120,255.72 : 165,941.59 = 81,414.53 : x
2. Step 2: Convert to fraction form
   120,255.72/165,941.59 = 81,414.53/x
3. Step 3: Cross multiply
   120,255.72x = 165,941.59 × 81,414.53
4. Step 4: Simplify right side
   120,255.72x = 13,510,057,276.76
5. Step 5: Solve for x
   x = 13,510,057,276.76/120,255.72
6. Step 6: Final answer
   x = 112,344.40