Finding the Fourth Proportional to 1,131.09, 1,560.72 and 633.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.09 : 1,560.72 = 633.72 : x
2. Step 2: Convert to fraction form
   1,131.09/1,560.72 = 633.72/x
3. Step 3: Cross multiply
   1,131.09x = 1,560.72 × 633.72
4. Step 4: Simplify right side
   1,131.09x = 989,059.48
5. Step 5: Solve for x
   x = 989,059.48/1,131.09
6. Step 6: Final answer
   x = 874.43