Finding the Fourth Proportional to 1,308.39, 1,802.25 and 1,222.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.39 : 1,802.25 = 1,222.29 : x
2. Step 2: Convert to fraction form
   1,308.39/1,802.25 = 1,222.29/x
3. Step 3: Cross multiply
   1,308.39x = 1,802.25 × 1,222.29
4. Step 4: Simplify right side
   1,308.39x = 2,202,872.15
5. Step 5: Solve for x
   x = 2,202,872.15/1,308.39
6. Step 6: Final answer
   x = 1,683.66