Finding the Fourth Proportional to 1,426.27, 2,139.53 and 560.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.27 : 2,139.53 = 560.38 : x
2. Step 2: Convert to fraction form
   1,426.27/2,139.53 = 560.38/x
3. Step 3: Cross multiply
   1,426.27x = 2,139.53 × 560.38
4. Step 4: Simplify right side
   1,426.27x = 1,198,940.52
5. Step 5: Solve for x
   x = 1,198,940.52/1,426.27
6. Step 6: Final answer
   x = 840.62