Finding the Fourth Proportional to 86,939.30, 130,436.94 and 39,571.34

Step by Step Solution

1. Step 1: Write the proportion equation
   86,939.30 : 130,436.94 = 39,571.34 : x
2. Step 2: Convert to fraction form
   86,939.30/130,436.94 = 39,571.34/x
3. Step 3: Cross multiply
   86,939.30x = 130,436.94 × 39,571.34
4. Step 4: Simplify right side
   86,939.30x = 5,161,564,501.30
5. Step 5: Solve for x
   x = 5,161,564,501.30/86,939.30
6. Step 6: Final answer
   x = 59,369.75