Finding the Fourth Proportional to 1,222.09, 1,686.13 and 796.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.09 : 1,686.13 = 796.84 : x
2. Step 2: Convert to fraction form
   1,222.09/1,686.13 = 796.84/x
3. Step 3: Cross multiply
   1,222.09x = 1,686.13 × 796.84
4. Step 4: Simplify right side
   1,222.09x = 1,343,575.83
5. Step 5: Solve for x
   x = 1,343,575.83/1,222.09
6. Step 6: Final answer
   x = 1,099.41