Finding the Fourth Proportional to 1,131.92, 1,561.88 and 634.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.92 : 1,561.88 = 634.58 : x
2. Step 2: Convert to fraction form
   1,131.92/1,561.88 = 634.58/x
3. Step 3: Cross multiply
   1,131.92x = 1,561.88 × 634.58
4. Step 4: Simplify right side
   1,131.92x = 991,131.59
5. Step 5: Solve for x
   x = 991,131.59/1,131.92
6. Step 6: Final answer
   x = 875.62