Finding the Fourth Proportional to 72,123.18, 99,528.01 and 39,416.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,123.18 : 99,528.01 = 39,416.28 : x
2. Step 2: Convert to fraction form
   72,123.18/99,528.01 = 39,416.28/x
3. Step 3: Cross multiply
   72,123.18x = 99,528.01 × 39,416.28
4. Step 4: Simplify right side
   72,123.18x = 3,923,023,910.00
5. Step 5: Solve for x
   x = 3,923,023,910.00/72,123.18
6. Step 6: Final answer
   x = 54,393.39