Finding the Fourth Proportional to 71,940.59, 99,274.37 and 39,680.83

Step by Step Solution

1. Step 1: Write the proportion equation
   71,940.59 : 99,274.37 = 39,680.83 : x
2. Step 2: Convert to fraction form
   71,940.59/99,274.37 = 39,680.83/x
3. Step 3: Cross multiply
   71,940.59x = 99,274.37 × 39,680.83
4. Step 4: Simplify right side
   71,940.59x = 3,939,289,399.33
5. Step 5: Solve for x
   x = 3,939,289,399.33/71,940.59
6. Step 6: Final answer
   x = 54,757.54