Finding the Fourth Proportional to 2,648.30, 3,971.79 and 892.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.30 : 3,971.79 = 892.83 : x
2. Step 2: Convert to fraction form
   2,648.30/3,971.79 = 892.83/x
3. Step 3: Cross multiply
   2,648.30x = 3,971.79 × 892.83
4. Step 4: Simplify right side
   2,648.30x = 3,546,148.16
5. Step 5: Solve for x
   x = 3,546,148.16/2,648.30
6. Step 6: Final answer
   x = 1,339.03