Finding the Fourth Proportional to 1,131.12, 1,560.56 and 633.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.12 : 1,560.56 = 633.69 : x
2. Step 2: Convert to fraction form
   1,131.12/1,560.56 = 633.69/x
3. Step 3: Cross multiply
   1,131.12x = 1,560.56 × 633.69
4. Step 4: Simplify right side
   1,131.12x = 988,908.10
5. Step 5: Solve for x
   x = 988,908.10/1,131.12
6. Step 6: Final answer
   x = 874.27