Finding the Fourth Proportional to 1,665.44, 2,495.78 and 1,223.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.44 : 2,495.78 = 1,223.23 : x
2. Step 2: Convert to fraction form
   1,665.44/2,495.78 = 1,223.23/x
3. Step 3: Cross multiply
   1,665.44x = 2,495.78 × 1,223.23
4. Step 4: Simplify right side
   1,665.44x = 3,052,908.02
5. Step 5: Solve for x
   x = 3,052,908.02/1,665.44
6. Step 6: Final answer
   x = 1,833.09