Finding the Fourth Proportional to 72,105.30, 99,504.72 and 39,839.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,105.30 : 99,504.72 = 39,839.82 : x
2. Step 2: Convert to fraction form
   72,105.30/99,504.72 = 39,839.82/x
3. Step 3: Cross multiply
   72,105.30x = 99,504.72 × 39,839.82
4. Step 4: Simplify right side
   72,105.30x = 3,964,250,133.95
5. Step 5: Solve for x
   x = 3,964,250,133.95/72,105.30
6. Step 6: Final answer
   x = 54,978.62