Finding the Fourth Proportional to 3,826.56, 5,280.00 and 2,407.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,826.56 : 5,280.00 = 2,407.78 : x
2. Step 2: Convert to fraction form
   3,826.56/5,280.00 = 2,407.78/x
3. Step 3: Cross multiply
   3,826.56x = 5,280.00 × 2,407.78
4. Step 4: Simplify right side
   3,826.56x = 12,713,059.81
5. Step 5: Solve for x
   x = 12,713,059.81/3,826.56
6. Step 6: Final answer
   x = 3,322.32