Finding the Fourth Proportional to 2,738.78, 4,108.23 and 983.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.78 : 4,108.23 = 983.90 : x
2. Step 2: Convert to fraction form
   2,738.78/4,108.23 = 983.90/x
3. Step 3: Cross multiply
   2,738.78x = 4,108.23 × 983.90
4. Step 4: Simplify right side
   2,738.78x = 4,042,066.96
5. Step 5: Solve for x
   x = 4,042,066.96/2,738.78
6. Step 6: Final answer
   x = 1,475.87