Finding the Fourth Proportional to 2,429.29, 3,640.49 and 1,109.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.29 : 3,640.49 = 1,109.80 : x
2. Step 2: Convert to fraction form
   2,429.29/3,640.49 = 1,109.80/x
3. Step 3: Cross multiply
   2,429.29x = 3,640.49 × 1,109.80
4. Step 4: Simplify right side
   2,429.29x = 4,040,210.25
5. Step 5: Solve for x
   x = 4,040,210.25/2,429.29
6. Step 6: Final answer
   x = 1,663.12