Finding the Fourth Proportional to 1,426.11, 1,968.78 and 1,007.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.11 : 1,968.78 = 1,007.73 : x
2. Step 2: Convert to fraction form
   1,426.11/1,968.78 = 1,007.73/x
3. Step 3: Cross multiply
   1,426.11x = 1,968.78 × 1,007.73
4. Step 4: Simplify right side
   1,426.11x = 1,983,998.67
5. Step 5: Solve for x
   x = 1,983,998.67/1,426.11
6. Step 6: Final answer
   x = 1,391.20