Finding the Fourth Proportional to 1,335.27, 1,843.25 and 915.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.27 : 1,843.25 = 915.49 : x
2. Step 2: Convert to fraction form
   1,335.27/1,843.25 = 915.49/x
3. Step 3: Cross multiply
   1,335.27x = 1,843.25 × 915.49
4. Step 4: Simplify right side
   1,335.27x = 1,687,476.94
5. Step 5: Solve for x
   x = 1,687,476.94/1,335.27
6. Step 6: Final answer
   x = 1,263.77