Finding the Fourth Proportional to 1,411.88, 1,948.92 and 915.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.88 : 1,948.92 = 915.08 : x
2. Step 2: Convert to fraction form
   1,411.88/1,948.92 = 915.08/x
3. Step 3: Cross multiply
   1,411.88x = 1,948.92 × 915.08
4. Step 4: Simplify right side
   1,411.88x = 1,783,417.71
5. Step 5: Solve for x
   x = 1,783,417.71/1,411.88
6. Step 6: Final answer
   x = 1,263.15