Finding the Fourth Proportional to 1,129.98, 1,559.42 and 632.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.98 : 1,559.42 = 632.62 : x
2. Step 2: Convert to fraction form
   1,129.98/1,559.42 = 632.62/x
3. Step 3: Cross multiply
   1,129.98x = 1,559.42 × 632.62
4. Step 4: Simplify right side
   1,129.98x = 986,520.28
5. Step 5: Solve for x
   x = 986,520.28/1,129.98
6. Step 6: Final answer
   x = 873.04