Finding the Fourth Proportional to 2,086.08, 3,127.41 and 915.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.08 : 3,127.41 = 915.23 : x
2. Step 2: Convert to fraction form
   2,086.08/3,127.41 = 915.23/x
3. Step 3: Cross multiply
   2,086.08x = 3,127.41 × 915.23
4. Step 4: Simplify right side
   2,086.08x = 2,862,283.82
5. Step 5: Solve for x
   x = 2,862,283.82/2,086.08
6. Step 6: Final answer
   x = 1,372.09