Finding the Fourth Proportional to 1,131.47, 1,561.36 and 634.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.47 : 1,561.36 = 634.10 : x
2. Step 2: Convert to fraction form
   1,131.47/1,561.36 = 634.10/x
3. Step 3: Cross multiply
   1,131.47x = 1,561.36 × 634.10
4. Step 4: Simplify right side
   1,131.47x = 990,058.38
5. Step 5: Solve for x
   x = 990,058.38/1,131.47
6. Step 6: Final answer
   x = 875.02