Finding the Fourth Proportional to 3,931.31, 5,425.90 and 2,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.31 : 5,425.90 = 2,359.50 : x
2. Step 2: Convert to fraction form
   3,931.31/5,425.90 = 2,359.50/x
3. Step 3: Cross multiply
   3,931.31x = 5,425.90 × 2,359.50
4. Step 4: Simplify right side
   3,931.31x = 12,802,405.15
5. Step 5: Solve for x
   x = 12,802,405.15/3,931.31
6. Step 6: Final answer
   x = 3,256.53