Finding the Fourth Proportional to 1,513.35, 2,088.83 and 915.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.35 : 2,088.83 = 915.85 : x
2. Step 2: Convert to fraction form
   1,513.35/2,088.83 = 915.85/x
3. Step 3: Cross multiply
   1,513.35x = 2,088.83 × 915.85
4. Step 4: Simplify right side
   1,513.35x = 1,913,045.15
5. Step 5: Solve for x
   x = 1,913,045.15/1,513.35
6. Step 6: Final answer
   x = 1,264.11