Finding the Fourth Proportional to 2,603.49, 3,901.59 and 2,217.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,603.49 : 3,901.59 = 2,217.12 : x
2. Step 2: Convert to fraction form
   2,603.49/3,901.59 = 2,217.12/x
3. Step 3: Cross multiply
   2,603.49x = 3,901.59 × 2,217.12
4. Step 4: Simplify right side
   2,603.49x = 8,650,293.22
5. Step 5: Solve for x
   x = 8,650,293.22/2,603.49
6. Step 6: Final answer
   x = 3,322.58