Finding the Fourth Proportional to 120,688.88, 181,042.20 and 31,941.78

Step by Step Solution

1. Step 1: Write the proportion equation
   120,688.88 : 181,042.20 = 31,941.78 : x
2. Step 2: Convert to fraction form
   120,688.88/181,042.20 = 31,941.78/x
3. Step 3: Cross multiply
   120,688.88x = 181,042.20 × 31,941.78
4. Step 4: Simplify right side
   120,688.88x = 5,782,810,123.12
5. Step 5: Solve for x
   x = 5,782,810,123.12/120,688.88
6. Step 6: Final answer
   x = 47,915.02