Finding the Fourth Proportional to 1,128.27, 1,557.18 and 814.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.27 : 1,557.18 = 814.59 : x
2. Step 2: Convert to fraction form
   1,128.27/1,557.18 = 814.59/x
3. Step 3: Cross multiply
   1,128.27x = 1,557.18 × 814.59
4. Step 4: Simplify right side
   1,128.27x = 1,268,463.26
5. Step 5: Solve for x
   x = 1,268,463.26/1,128.27
6. Step 6: Final answer
   x = 1,124.26