Finding the Fourth Proportional to 2,474.39, 3,711.17 and 915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,474.39 : 3,711.17 = 915.12 : x
2. Step 2: Convert to fraction form
   2,474.39/3,711.17 = 915.12/x
3. Step 3: Cross multiply
   2,474.39x = 3,711.17 × 915.12
4. Step 4: Simplify right side
   2,474.39x = 3,396,165.89
5. Step 5: Solve for x
   x = 3,396,165.89/2,474.39
6. Step 6: Final answer
   x = 1,372.53