Finding the Fourth Proportional to 1,968.91, 2,716.93 and 1,222.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,968.91 : 2,716.93 = 1,222.72 : x
2. Step 2: Convert to fraction form
   1,968.91/2,716.93 = 1,222.72/x
3. Step 3: Cross multiply
   1,968.91x = 2,716.93 × 1,222.72
4. Step 4: Simplify right side
   1,968.91x = 3,322,045.31
5. Step 5: Solve for x
   x = 3,322,045.31/1,968.91
6. Step 6: Final answer
   x = 1,687.25