Finding the Fourth Proportional to 1,531.08, 2,112.82 and 868.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.08 : 2,112.82 = 868.03 : x
2. Step 2: Convert to fraction form
   1,531.08/2,112.82 = 868.03/x
3. Step 3: Cross multiply
   1,531.08x = 2,112.82 × 868.03
4. Step 4: Simplify right side
   1,531.08x = 1,833,983.69
5. Step 5: Solve for x
   x = 1,833,983.69/1,531.08
6. Step 6: Final answer
   x = 1,197.84