Finding the Fourth Proportional to 71,796.80, 99,078.78 and 39,530.76

Step by Step Solution

1. Step 1: Write the proportion equation
   71,796.80 : 99,078.78 = 39,530.76 : x
2. Step 2: Convert to fraction form
   71,796.80/99,078.78 = 39,530.76/x
3. Step 3: Cross multiply
   71,796.80x = 99,078.78 × 39,530.76
4. Step 4: Simplify right side
   71,796.80x = 3,916,659,473.27
5. Step 5: Solve for x
   x = 3,916,659,473.27/71,796.80
6. Step 6: Final answer
   x = 54,552.01