Finding the Fourth Proportional to 2,648.07, 3,970.56 and 798.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.07 : 3,970.56 = 798.63 : x
2. Step 2: Convert to fraction form
   2,648.07/3,970.56 = 798.63/x
3. Step 3: Cross multiply
   2,648.07x = 3,970.56 × 798.63
4. Step 4: Simplify right side
   2,648.07x = 3,171,008.33
5. Step 5: Solve for x
   x = 3,171,008.33/2,648.07
6. Step 6: Final answer
   x = 1,197.48