Finding the Fourth Proportional to 2,216.80, 3,322.61 and 1,425.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.80 : 3,322.61 = 1,425.15 : x
2. Step 2: Convert to fraction form
   2,216.80/3,322.61 = 1,425.15/x
3. Step 3: Cross multiply
   2,216.80x = 3,322.61 × 1,425.15
4. Step 4: Simplify right side
   2,216.80x = 4,735,210.52
5. Step 5: Solve for x
   x = 4,735,210.52/2,216.80
6. Step 6: Final answer
   x = 2,136.06