Finding the Fourth Proportional to 1,789.48, 2,469.45 and 992.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.48 : 2,469.45 = 992.78 : x
2. Step 2: Convert to fraction form
   1,789.48/2,469.45 = 992.78/x
3. Step 3: Cross multiply
   1,789.48x = 2,469.45 × 992.78
4. Step 4: Simplify right side
   1,789.48x = 2,451,620.57
5. Step 5: Solve for x
   x = 2,451,620.57/1,789.48
6. Step 6: Final answer
   x = 1,370.02