Finding the Fourth Proportional to 65,239.97, 89,969.15 and 42,571.71

Step by Step Solution

1. Step 1: Write the proportion equation
   65,239.97 : 89,969.15 = 42,571.71 : x
2. Step 2: Convert to fraction form
   65,239.97/89,969.15 = 42,571.71/x
3. Step 3: Cross multiply
   65,239.97x = 89,969.15 × 42,571.71
4. Step 4: Simplify right side
   65,239.97x = 3,830,140,669.18
5. Step 5: Solve for x
   x = 3,830,140,669.18/65,239.97
6. Step 6: Final answer
   x = 58,708.50