Finding the Fourth Proportional to 1,426.94, 1,968.09 and 1,228.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.94 : 1,968.09 = 1,228.10 : x
2. Step 2: Convert to fraction form
   1,426.94/1,968.09 = 1,228.10/x
3. Step 3: Cross multiply
   1,426.94x = 1,968.09 × 1,228.10
4. Step 4: Simplify right side
   1,426.94x = 2,417,016.25
5. Step 5: Solve for x
   x = 2,417,016.25/1,426.94
6. Step 6: Final answer
   x = 1,693.84