Finding the Fourth Proportional to 1,513.24, 2,089.09 and 915.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.24 : 2,089.09 = 915.83 : x
2. Step 2: Convert to fraction form
   1,513.24/2,089.09 = 915.83/x
3. Step 3: Cross multiply
   1,513.24x = 2,089.09 × 915.83
4. Step 4: Simplify right side
   1,513.24x = 1,913,249.83
5. Step 5: Solve for x
   x = 1,913,249.83/1,513.24
6. Step 6: Final answer
   x = 1,264.34