Finding the Fourth Proportional to 2,335.12, 3,222.68 and 1,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.12 : 3,222.68 = 1,340.72 : x
2. Step 2: Convert to fraction form
   2,335.12/3,222.68 = 1,340.72/x
3. Step 3: Cross multiply
   2,335.12x = 3,222.68 × 1,340.72
4. Step 4: Simplify right side
   2,335.12x = 4,320,711.53
5. Step 5: Solve for x
   x = 4,320,711.53/2,335.12
6. Step 6: Final answer
   x = 1,850.32