Finding the Fourth Proportional to 2,648.48, 3,972.74 and 799.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.48 : 3,972.74 = 799.61 : x
2. Step 2: Convert to fraction form
   2,648.48/3,972.74 = 799.61/x
3. Step 3: Cross multiply
   2,648.48x = 3,972.74 × 799.61
4. Step 4: Simplify right side
   2,648.48x = 3,176,621.02
5. Step 5: Solve for x
   x = 3,176,621.02/2,648.48
6. Step 6: Final answer
   x = 1,199.42