Finding the Fourth Proportional to 1,969.02, 2,716.58 and 1,222.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.02 : 2,716.58 = 1,222.72 : x
2. Step 2: Convert to fraction form
   1,969.02/2,716.58 = 1,222.72/x
3. Step 3: Cross multiply
   1,969.02x = 2,716.58 × 1,222.72
4. Step 4: Simplify right side
   1,969.02x = 3,321,616.70
5. Step 5: Solve for x
   x = 3,321,616.70/1,969.02
6. Step 6: Final answer
   x = 1,686.94