Finding the Fourth Proportional to 71,776.71, 99,050.89 and 39,945.60

Step by Step Solution

1. Step 1: Write the proportion equation
   71,776.71 : 99,050.89 = 39,945.60 : x
2. Step 2: Convert to fraction form
   71,776.71/99,050.89 = 39,945.60/x
3. Step 3: Cross multiply
   71,776.71x = 99,050.89 × 39,945.60
4. Step 4: Simplify right side
   71,776.71x = 3,956,646,736.33
5. Step 5: Solve for x
   x = 3,956,646,736.33/71,776.71
6. Step 6: Final answer
   x = 55,124.39