Finding the Fourth Proportional to 2,422.88, 3,638.40 and 1,329.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,422.88 : 3,638.40 = 1,329.32 : x
2. Step 2: Convert to fraction form
   2,422.88/3,638.40 = 1,329.32/x
3. Step 3: Cross multiply
   2,422.88x = 3,638.40 × 1,329.32
4. Step 4: Simplify right side
   2,422.88x = 4,836,597.89
5. Step 5: Solve for x
   x = 4,836,597.89/2,422.88
6. Step 6: Final answer
   x = 1,996.22