Finding the Fourth Proportional to 1,426.72, 2,135.74 and 938.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.72 : 2,135.74 = 938.56 : x
2. Step 2: Convert to fraction form
   1,426.72/2,135.74 = 938.56/x
3. Step 3: Cross multiply
   1,426.72x = 2,135.74 × 938.56
4. Step 4: Simplify right side
   1,426.72x = 2,004,520.13
5. Step 5: Solve for x
   x = 2,004,520.13/1,426.72
6. Step 6: Final answer
   x = 1,404.98