Finding the Fourth Proportional to 71,311.09, 98,410.76 and 42,660.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,311.09 : 98,410.76 = 42,660.31 : x
2. Step 2: Convert to fraction form
   71,311.09/98,410.76 = 42,660.31/x
3. Step 3: Cross multiply
   71,311.09x = 98,410.76 × 42,660.31
4. Step 4: Simplify right side
   71,311.09x = 4,198,233,528.94
5. Step 5: Solve for x
   x = 4,198,233,528.94/71,311.09
6. Step 6: Final answer
   x = 58,872.10