Finding the Fourth Proportional to 1,151.89, 1,587.94 and 915.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.89 : 1,587.94 = 915.94 : x
2. Step 2: Convert to fraction form
   1,151.89/1,587.94 = 915.94/x
3. Step 3: Cross multiply
   1,151.89x = 1,587.94 × 915.94
4. Step 4: Simplify right side
   1,151.89x = 1,454,447.15
5. Step 5: Solve for x
   x = 1,454,447.15/1,151.89
6. Step 6: Final answer
   x = 1,262.66