Finding the Fourth Proportional to 1,308.89, 1,802.94 and 1,222.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.89 : 1,802.94 = 1,222.79 : x
2. Step 2: Convert to fraction form
   1,308.89/1,802.94 = 1,222.79/x
3. Step 3: Cross multiply
   1,308.89x = 1,802.94 × 1,222.79
4. Step 4: Simplify right side
   1,308.89x = 2,204,617.00
5. Step 5: Solve for x
   x = 2,204,617.00/1,308.89
6. Step 6: Final answer
   x = 1,684.35