Finding the Fourth Proportional to 2,614.28, 3,921.98 and 1,298.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,614.28 : 3,921.98 = 1,298.75 : x
2. Step 2: Convert to fraction form
   2,614.28/3,921.98 = 1,298.75/x
3. Step 3: Cross multiply
   2,614.28x = 3,921.98 × 1,298.75
4. Step 4: Simplify right side
   2,614.28x = 5,093,645.42
5. Step 5: Solve for x
   x = 5,093,645.42/2,614.28
6. Step 6: Final answer
   x = 1,948.40