Finding the Fourth Proportional to 1,969.16, 2,718.24 and 1,222.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.16 : 2,718.24 = 1,222.88 : x
2. Step 2: Convert to fraction form
   1,969.16/2,718.24 = 1,222.88/x
3. Step 3: Cross multiply
   1,969.16x = 2,718.24 × 1,222.88
4. Step 4: Simplify right side
   1,969.16x = 3,324,081.33
5. Step 5: Solve for x
   x = 3,324,081.33/1,969.16
6. Step 6: Final answer
   x = 1,688.07