Finding the Fourth Proportional to 71,968.84, 108,046.81 and 55,340.55

Step by Step Solution

1. Step 1: Write the proportion equation
   71,968.84 : 108,046.81 = 55,340.55 : x
2. Step 2: Convert to fraction form
   71,968.84/108,046.81 = 55,340.55/x
3. Step 3: Cross multiply
   71,968.84x = 108,046.81 × 55,340.55
4. Step 4: Simplify right side
   71,968.84x = 5,979,369,891.15
5. Step 5: Solve for x
   x = 5,979,369,891.15/71,968.84
6. Step 6: Final answer
   x = 83,082.76