Finding the Fourth Proportional to 2,425.72, 3,639.04 and 1,109.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,425.72 : 3,639.04 = 1,109.56 : x
2. Step 2: Convert to fraction form
   2,425.72/3,639.04 = 1,109.56/x
3. Step 3: Cross multiply
   2,425.72x = 3,639.04 × 1,109.56
4. Step 4: Simplify right side
   2,425.72x = 4,037,733.22
5. Step 5: Solve for x
   x = 4,037,733.22/2,425.72
6. Step 6: Final answer
   x = 1,664.55