Finding the Fourth Proportional to 2,340.64, 3,229.86 and 1,396.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.64 : 3,229.86 = 1,396.72 : x
2. Step 2: Convert to fraction form
   2,340.64/3,229.86 = 1,396.72/x
3. Step 3: Cross multiply
   2,340.64x = 3,229.86 × 1,396.72
4. Step 4: Simplify right side
   2,340.64x = 4,511,210.06
5. Step 5: Solve for x
   x = 4,511,210.06/2,340.64
6. Step 6: Final answer
   x = 1,927.34