Finding the Fourth Proportional to 31,123.89, 46,685.43 and 7,750.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.89 : 46,685.43 = 7,750.53 : x
2. Step 2: Convert to fraction form
   31,123.89/46,685.43 = 7,750.53/x
3. Step 3: Cross multiply
   31,123.89x = 46,685.43 × 7,750.53
4. Step 4: Simplify right side
   31,123.89x = 361,836,825.78
5. Step 5: Solve for x
   x = 361,836,825.78/31,123.89
6. Step 6: Final answer
   x = 11,625.69