Finding the Fourth Proportional to 71,606.42, 98,816.81 and 39,778.28

Step by Step Solution

1. Step 1: Write the proportion equation
   71,606.42 : 98,816.81 = 39,778.28 : x
2. Step 2: Convert to fraction form
   71,606.42/98,816.81 = 39,778.28/x
3. Step 3: Cross multiply
   71,606.42x = 98,816.81 × 39,778.28
4. Step 4: Simplify right side
   71,606.42x = 3,930,762,736.89
5. Step 5: Solve for x
   x = 3,930,762,736.89/71,606.42
6. Step 6: Final answer
   x = 54,894.00