Finding the Fourth Proportional to 2,275.21, 3,412.54 and 1,338.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.21 : 3,412.54 = 1,338.72 : x
2. Step 2: Convert to fraction form
   2,275.21/3,412.54 = 1,338.72/x
3. Step 3: Cross multiply
   2,275.21x = 3,412.54 × 1,338.72
4. Step 4: Simplify right side
   2,275.21x = 4,568,435.55
5. Step 5: Solve for x
   x = 4,568,435.55/2,275.21
6. Step 6: Final answer
   x = 2,007.92