Finding the Fourth Proportional to 1,426.72, 2,138.82 and 1,340.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.72 : 2,138.82 = 1,340.68 : x
2. Step 2: Convert to fraction form
   1,426.72/2,138.82 = 1,340.68/x
3. Step 3: Cross multiply
   1,426.72x = 2,138.82 × 1,340.68
4. Step 4: Simplify right side
   1,426.72x = 2,867,473.20
5. Step 5: Solve for x
   x = 2,867,473.20/1,426.72
6. Step 6: Final answer
   x = 2,009.84