Finding the Fourth Proportional to 72,123.43, 99,528.36 and 39,416.53

Step by Step Solution

1. Step 1: Write the proportion equation
   72,123.43 : 99,528.36 = 39,416.53 : x
2. Step 2: Convert to fraction form
   72,123.43/99,528.36 = 39,416.53/x
3. Step 3: Cross multiply
   72,123.43x = 99,528.36 × 39,416.53
4. Step 4: Simplify right side
   72,123.43x = 3,923,062,090.15
5. Step 5: Solve for x
   x = 3,923,062,090.15/72,123.43
6. Step 6: Final answer
   x = 54,393.73