Finding the Fourth Proportional to 1,131.36, 1,561.17 and 633.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.36 : 1,561.17 = 633.93 : x
2. Step 2: Convert to fraction form
   1,131.36/1,561.17 = 633.93/x
3. Step 3: Cross multiply
   1,131.36x = 1,561.17 × 633.93
4. Step 4: Simplify right side
   1,131.36x = 989,672.50
5. Step 5: Solve for x
   x = 989,672.50/1,131.36
6. Step 6: Final answer
   x = 874.76