Finding the Fourth Proportional to 2,209.52, 3,309.76 and 1,097.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.52 : 3,309.76 = 1,097.28 : x
2. Step 2: Convert to fraction form
   2,209.52/3,309.76 = 1,097.28/x
3. Step 3: Cross multiply
   2,209.52x = 3,309.76 × 1,097.28
4. Step 4: Simplify right side
   2,209.52x = 3,631,733.45
5. Step 5: Solve for x
   x = 3,631,733.45/2,209.52
6. Step 6: Final answer
   x = 1,643.68