Finding the Fourth Proportional to 72,116.04, 99,519.18 and 39,850.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,116.04 : 99,519.18 = 39,850.60 : x
2. Step 2: Convert to fraction form
   72,116.04/99,519.18 = 39,850.60/x
3. Step 3: Cross multiply
   72,116.04x = 99,519.18 × 39,850.60
4. Step 4: Simplify right side
   72,116.04x = 3,965,899,047.03
5. Step 5: Solve for x
   x = 3,965,899,047.03/72,116.04
6. Step 6: Final answer
   x = 54,993.30