Finding the Fourth Proportional to 71,919.82, 99,250.04 and 39,655.60

Step by Step Solution

1. Step 1: Write the proportion equation
   71,919.82 : 99,250.04 = 39,655.60 : x
2. Step 2: Convert to fraction form
   71,919.82/99,250.04 = 39,655.60/x
3. Step 3: Cross multiply
   71,919.82x = 99,250.04 × 39,655.60
4. Step 4: Simplify right side
   71,919.82x = 3,935,820,016.38
5. Step 5: Solve for x
   x = 3,935,820,016.38/71,919.82
6. Step 6: Final answer
   x = 54,725.11