Finding the Fourth Proportional to 3,929.46, 5,422.46 and 2,250.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.46 : 5,422.46 = 2,250.78 : x
2. Step 2: Convert to fraction form
   3,929.46/5,422.46 = 2,250.78/x
3. Step 3: Cross multiply
   3,929.46x = 5,422.46 × 2,250.78
4. Step 4: Simplify right side
   3,929.46x = 12,204,753.26
5. Step 5: Solve for x
   x = 12,204,753.26/3,929.46
6. Step 6: Final answer
   x = 3,105.96