Finding the Fourth Proportional to 2,209.73, 3,314.69 and 1,112.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.73 : 3,314.69 = 1,112.79 : x
2. Step 2: Convert to fraction form
   2,209.73/3,314.69 = 1,112.79/x
3. Step 3: Cross multiply
   2,209.73x = 3,314.69 × 1,112.79
4. Step 4: Simplify right side
   2,209.73x = 3,688,540.09
5. Step 5: Solve for x
   x = 3,688,540.09/2,209.73
6. Step 6: Final answer
   x = 1,669.23