Finding the Fourth Proportional to 1,131.38, 1,561.33 and 634.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.38 : 1,561.33 = 634.02 : x
2. Step 2: Convert to fraction form
   1,131.38/1,561.33 = 634.02/x
3. Step 3: Cross multiply
   1,131.38x = 1,561.33 × 634.02
4. Step 4: Simplify right side
   1,131.38x = 989,914.45
5. Step 5: Solve for x
   x = 989,914.45/1,131.38
6. Step 6: Final answer
   x = 874.96