Finding the Fourth Proportional to 2,216.85, 3,319.41 and 1,338.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.85 : 3,319.41 = 1,338.18 : x
2. Step 2: Convert to fraction form
   2,216.85/3,319.41 = 1,338.18/x
3. Step 3: Cross multiply
   2,216.85x = 3,319.41 × 1,338.18
4. Step 4: Simplify right side
   2,216.85x = 4,441,961.01
5. Step 5: Solve for x
   x = 4,441,961.01/2,216.85
6. Step 6: Final answer
   x = 2,003.73