Finding the Fourth Proportional to 1,426.78, 2,137.33 and 938.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.78 : 2,137.33 = 938.35 : x
2. Step 2: Convert to fraction form
   1,426.78/2,137.33 = 938.35/x
3. Step 3: Cross multiply
   1,426.78x = 2,137.33 × 938.35
4. Step 4: Simplify right side
   1,426.78x = 2,005,563.61
5. Step 5: Solve for x
   x = 2,005,563.61/1,426.78
6. Step 6: Final answer
   x = 1,405.66