Finding the Fourth Proportional to 915.20, 1,264.82 and 836.83

Step by Step Solution

1. Step 1: Write the proportion equation
   915.20 : 1,264.82 = 836.83 : x
2. Step 2: Convert to fraction form
   915.20/1,264.82 = 836.83/x
3. Step 3: Cross multiply
   915.20x = 1,264.82 × 836.83
4. Step 4: Simplify right side
   915.20x = 1,058,436.72
5. Step 5: Solve for x
   x = 1,058,436.72/915.20
6. Step 6: Final answer
   x = 1,156.51