Finding the Fourth Proportional to 1,151.52, 1,587.91 and 815.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.52 : 1,587.91 = 815.27 : x
2. Step 2: Convert to fraction form
   1,151.52/1,587.91 = 815.27/x
3. Step 3: Cross multiply
   1,151.52x = 1,587.91 × 815.27
4. Step 4: Simplify right side
   1,151.52x = 1,294,582.63
5. Step 5: Solve for x
   x = 1,294,582.63/1,151.52
6. Step 6: Final answer
   x = 1,124.23