Finding the Fourth Proportional to 1,838.97, 2,756.34 and 915.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,838.97 : 2,756.34 = 915.15 : x
2. Step 2: Convert to fraction form
   1,838.97/2,756.34 = 915.15/x
3. Step 3: Cross multiply
   1,838.97x = 2,756.34 × 915.15
4. Step 4: Simplify right side
   1,838.97x = 2,522,464.55
5. Step 5: Solve for x
   x = 2,522,464.55/1,838.97
6. Step 6: Final answer
   x = 1,371.67