Finding the Fourth Proportional to 1,131.48, 1,561.61 and 634.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.48 : 1,561.61 = 634.17 : x
2. Step 2: Convert to fraction form
   1,131.48/1,561.61 = 634.17/x
3. Step 3: Cross multiply
   1,131.48x = 1,561.61 × 634.17
4. Step 4: Simplify right side
   1,131.48x = 990,323.04
5. Step 5: Solve for x
   x = 990,323.04/1,131.48
6. Step 6: Final answer
   x = 875.25