Finding the Fourth Proportional to 1,661.24, 2,292.50 and 915.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.24 : 2,292.50 = 915.18 : x
2. Step 2: Convert to fraction form
   1,661.24/2,292.50 = 915.18/x
3. Step 3: Cross multiply
   1,661.24x = 2,292.50 × 915.18
4. Step 4: Simplify right side
   1,661.24x = 2,098,050.15
5. Step 5: Solve for x
   x = 2,098,050.15/1,661.24
6. Step 6: Final answer
   x = 1,262.94