Finding the Fourth Proportional to 3,899.46, 5,382.78 and 2,407.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.46 : 5,382.78 = 2,407.98 : x
2. Step 2: Convert to fraction form
   3,899.46/5,382.78 = 2,407.98/x
3. Step 3: Cross multiply
   3,899.46x = 5,382.78 × 2,407.98
4. Step 4: Simplify right side
   3,899.46x = 12,961,626.58
5. Step 5: Solve for x
   x = 12,961,626.58/3,899.46
6. Step 6: Final answer
   x = 3,323.95