Finding the Fourth Proportional to 71,765.69, 99,035.34 and 39,934.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,765.69 : 99,035.34 = 39,934.31 : x
2. Step 2: Convert to fraction form
   71,765.69/99,035.34 = 39,934.31/x
3. Step 3: Cross multiply
   71,765.69x = 99,035.34 × 39,934.31
4. Step 4: Simplify right side
   71,765.69x = 3,954,907,968.52
5. Step 5: Solve for x
   x = 3,954,907,968.52/71,765.69
6. Step 6: Final answer
   x = 55,108.62