Finding the Fourth Proportional to 1,129.91, 1,559.30 and 632.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.91 : 1,559.30 = 632.52 : x
2. Step 2: Convert to fraction form
   1,129.91/1,559.30 = 632.52/x
3. Step 3: Cross multiply
   1,129.91x = 1,559.30 × 632.52
4. Step 4: Simplify right side
   1,129.91x = 986,285.27
5. Step 5: Solve for x
   x = 986,285.27/1,129.91
6. Step 6: Final answer
   x = 872.89