Finding the Fourth Proportional to 1,131.13, 1,560.89 and 633.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.13 : 1,560.89 = 633.69 : x
2. Step 2: Convert to fraction form
   1,131.13/1,560.89 = 633.69/x
3. Step 3: Cross multiply
   1,131.13x = 1,560.89 × 633.69
4. Step 4: Simplify right side
   1,131.13x = 989,112.58
5. Step 5: Solve for x
   x = 989,112.58/1,131.13
6. Step 6: Final answer
   x = 874.45