Finding the Fourth Proportional to 72,224.96, 99,671.16 and 39,957.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,224.96 : 99,671.16 = 39,957.89 : x
2. Step 2: Convert to fraction form
   72,224.96/99,671.16 = 39,957.89/x
3. Step 3: Cross multiply
   72,224.96x = 99,671.16 × 39,957.89
4. Step 4: Simplify right side
   72,224.96x = 3,982,648,749.10
5. Step 5: Solve for x
   x = 3,982,648,749.10/72,224.96
6. Step 6: Final answer
   x = 55,142.28