Finding the Fourth Proportional to 1,614.52, 2,228.28 and 915.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,614.52 : 2,228.28 = 915.76 : x
2. Step 2: Convert to fraction form
   1,614.52/2,228.28 = 915.76/x
3. Step 3: Cross multiply
   1,614.52x = 2,228.28 × 915.76
4. Step 4: Simplify right side
   1,614.52x = 2,040,569.69
5. Step 5: Solve for x
   x = 2,040,569.69/1,614.52
6. Step 6: Final answer
   x = 1,263.89