Finding the Fourth Proportional to 2,216.75, 3,319.37 and 2,151.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.75 : 3,319.37 = 2,151.02 : x
2. Step 2: Convert to fraction form
   2,216.75/3,319.37 = 2,151.02/x
3. Step 3: Cross multiply
   2,216.75x = 3,319.37 × 2,151.02
4. Step 4: Simplify right side
   2,216.75x = 7,140,019.84
5. Step 5: Solve for x
   x = 7,140,019.84/2,216.75
6. Step 6: Final answer
   x = 3,220.93