Finding the Fourth Proportional to 2,192.40, 3,287.82 and 959.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,192.40 : 3,287.82 = 959.46 : x
2. Step 2: Convert to fraction form
   2,192.40/3,287.82 = 959.46/x
3. Step 3: Cross multiply
   2,192.40x = 3,287.82 × 959.46
4. Step 4: Simplify right side
   2,192.40x = 3,154,531.78
5. Step 5: Solve for x
   x = 3,154,531.78/2,192.40
6. Step 6: Final answer
   x = 1,438.85