Finding the Fourth Proportional to 72,118.01, 99,522.30 and 39,854.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,118.01 : 99,522.30 = 39,854.80 : x
2. Step 2: Convert to fraction form
   72,118.01/99,522.30 = 39,854.80/x
3. Step 3: Cross multiply
   72,118.01x = 99,522.30 × 39,854.80
4. Step 4: Simplify right side
   72,118.01x = 3,966,441,113.23
5. Step 5: Solve for x
   x = 3,966,441,113.23/72,118.01
6. Step 6: Final answer
   x = 54,999.31