Finding the Fourth Proportional to 1,131.73, 1,561.83 and 634.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.73 : 1,561.83 = 634.48 : x
2. Step 2: Convert to fraction form
   1,131.73/1,561.83 = 634.48/x
3. Step 3: Cross multiply
   1,131.73x = 1,561.83 × 634.48
4. Step 4: Simplify right side
   1,131.73x = 990,949.90
5. Step 5: Solve for x
   x = 990,949.90/1,131.73
6. Step 6: Final answer
   x = 875.61