Finding the Fourth Proportional to 2,543.28, 3,815.49 and 983.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.28 : 3,815.49 = 983.28 : x
2. Step 2: Convert to fraction form
   2,543.28/3,815.49 = 983.28/x
3. Step 3: Cross multiply
   2,543.28x = 3,815.49 × 983.28
4. Step 4: Simplify right side
   2,543.28x = 3,751,713.00
5. Step 5: Solve for x
   x = 3,751,713.00/2,543.28
6. Step 6: Final answer
   x = 1,475.15