Finding the Fourth Proportional to 1,131.32, 1,561.14 and 633.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.32 : 1,561.14 = 633.95 : x
2. Step 2: Convert to fraction form
   1,131.32/1,561.14 = 633.95/x
3. Step 3: Cross multiply
   1,131.32x = 1,561.14 × 633.95
4. Step 4: Simplify right side
   1,131.32x = 989,688.61
5. Step 5: Solve for x
   x = 989,688.61/1,131.32
6. Step 6: Final answer
   x = 874.81