Finding the Fourth Proportional to 2,648.35, 3,972.56 and 799.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.35 : 3,972.56 = 799.50 : x
2. Step 2: Convert to fraction form
   2,648.35/3,972.56 = 799.50/x
3. Step 3: Cross multiply
   2,648.35x = 3,972.56 × 799.50
4. Step 4: Simplify right side
   2,648.35x = 3,176,061.72
5. Step 5: Solve for x
   x = 3,176,061.72/2,648.35
6. Step 6: Final answer
   x = 1,199.26