Finding the Fourth Proportional to 1,131.19, 1,561.06 and 633.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.19 : 1,561.06 = 633.82 : x
2. Step 2: Convert to fraction form
   1,131.19/1,561.06 = 633.82/x
3. Step 3: Cross multiply
   1,131.19x = 1,561.06 × 633.82
4. Step 4: Simplify right side
   1,131.19x = 989,427.88
5. Step 5: Solve for x
   x = 989,427.88/1,131.19
6. Step 6: Final answer
   x = 874.68