Finding the Fourth Proportional to 78,399.71, 108,224.72 and 52,940.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,399.71 : 108,224.72 = 52,940.55 : x
2. Step 2: Convert to fraction form
   78,399.71/108,224.72 = 52,940.55/x
3. Step 3: Cross multiply
   78,399.71x = 108,224.72 × 52,940.55
4. Step 4: Simplify right side
   78,399.71x = 5,729,476,200.40
5. Step 5: Solve for x
   x = 5,729,476,200.40/78,399.71
6. Step 6: Final answer
   x = 73,080.32