Finding the Fourth Proportional to 5,371.31, 7,412.92 and 3,132.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,371.31 : 7,412.92 = 3,132.78 : x
2. Step 2: Convert to fraction form
   5,371.31/7,412.92 = 3,132.78/x
3. Step 3: Cross multiply
   5,371.31x = 7,412.92 × 3,132.78
4. Step 4: Simplify right side
   5,371.31x = 23,223,011.89
5. Step 5: Solve for x
   x = 23,223,011.89/5,371.31
6. Step 6: Final answer
   x = 4,323.53