Finding the Fourth Proportional to 2,380.56, 3,288.78 and 2,216.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.56 : 3,288.78 = 2,216.64 : x
2. Step 2: Convert to fraction form
   2,380.56/3,288.78 = 2,216.64/x
3. Step 3: Cross multiply
   2,380.56x = 3,288.78 × 2,216.64
4. Step 4: Simplify right side
   2,380.56x = 7,290,041.30
5. Step 5: Solve for x
   x = 7,290,041.30/2,380.56
6. Step 6: Final answer
   x = 3,062.32