Finding the Fourth Proportional to 3,931.39, 5,426.25 and 2,253.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.39 : 5,426.25 = 2,253.78 : x
2. Step 2: Convert to fraction form
   3,931.39/5,426.25 = 2,253.78/x
3. Step 3: Cross multiply
   3,931.39x = 5,426.25 × 2,253.78
4. Step 4: Simplify right side
   3,931.39x = 12,229,573.73
5. Step 5: Solve for x
   x = 12,229,573.73/3,931.39
6. Step 6: Final answer
   x = 3,110.75