Finding the Fourth Proportional to 1,789.36, 2,469.29 and 992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.36 : 2,469.29 = 992.72 : x
2. Step 2: Convert to fraction form
   1,789.36/2,469.29 = 992.72/x
3. Step 3: Cross multiply
   1,789.36x = 2,469.29 × 992.72
4. Step 4: Simplify right side
   1,789.36x = 2,451,314.78
5. Step 5: Solve for x
   x = 2,451,314.78/1,789.36
6. Step 6: Final answer
   x = 1,369.94