Finding the Fourth Proportional to 1,131.15, 1,560.83 and 633.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.15 : 1,560.83 = 633.81 : x
2. Step 2: Convert to fraction form
   1,131.15/1,560.83 = 633.81/x
3. Step 3: Cross multiply
   1,131.15x = 1,560.83 × 633.81
4. Step 4: Simplify right side
   1,131.15x = 989,266.49
5. Step 5: Solve for x
   x = 989,266.49/1,131.15
6. Step 6: Final answer
   x = 874.57