Finding the Fourth Proportional to 2,221.25, 3,329.89 and 1,125.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.25 : 3,329.89 = 1,125.05 : x
2. Step 2: Convert to fraction form
   2,221.25/3,329.89 = 1,125.05/x
3. Step 3: Cross multiply
   2,221.25x = 3,329.89 × 1,125.05
4. Step 4: Simplify right side
   2,221.25x = 3,746,273.28
5. Step 5: Solve for x
   x = 3,746,273.28/2,221.25
6. Step 6: Final answer
   x = 1,686.56