Finding the Fourth Proportional to 1,129.89, 1,559.06 and 632.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.89 : 1,559.06 = 632.50 : x
2. Step 2: Convert to fraction form
   1,129.89/1,559.06 = 632.50/x
3. Step 3: Cross multiply
   1,129.89x = 1,559.06 × 632.50
4. Step 4: Simplify right side
   1,129.89x = 986,105.45
5. Step 5: Solve for x
   x = 986,105.45/1,129.89
6. Step 6: Final answer
   x = 872.74