Finding the Fourth Proportional to 2,217.69, 3,320.67 and 1,339.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.69 : 3,320.67 = 1,339.02 : x
2. Step 2: Convert to fraction form
   2,217.69/3,320.67 = 1,339.02/x
3. Step 3: Cross multiply
   2,217.69x = 3,320.67 × 1,339.02
4. Step 4: Simplify right side
   2,217.69x = 4,446,443.54
5. Step 5: Solve for x
   x = 4,446,443.54/2,217.69
6. Step 6: Final answer
   x = 2,004.99