Finding the Fourth Proportional to 1,426.28, 2,138.10 and 731.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.28 : 2,138.10 = 731.42 : x
2. Step 2: Convert to fraction form
   1,426.28/2,138.10 = 731.42/x
3. Step 3: Cross multiply
   1,426.28x = 2,138.10 × 731.42
4. Step 4: Simplify right side
   1,426.28x = 1,563,849.10
5. Step 5: Solve for x
   x = 1,563,849.10/1,426.28
6. Step 6: Final answer
   x = 1,096.45