Finding the Fourth Proportional to 1,028.86, 1,426.69 and 994.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.86 : 1,426.69 = 994.23 : x
2. Step 2: Convert to fraction form
   1,028.86/1,426.69 = 994.23/x
3. Step 3: Cross multiply
   1,028.86x = 1,426.69 × 994.23
4. Step 4: Simplify right side
   1,028.86x = 1,418,458.00
5. Step 5: Solve for x
   x = 1,418,458.00/1,028.86
6. Step 6: Final answer
   x = 1,378.67