Finding the Fourth Proportional to 2,574.28, 3,861.69 and 725.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.28 : 3,861.69 = 725.38 : x
2. Step 2: Convert to fraction form
   2,574.28/3,861.69 = 725.38/x
3. Step 3: Cross multiply
   2,574.28x = 3,861.69 × 725.38
4. Step 4: Simplify right side
   2,574.28x = 2,801,192.69
5. Step 5: Solve for x
   x = 2,801,192.69/2,574.28
6. Step 6: Final answer
   x = 1,088.15