Finding the Fourth Proportional to 2,648.59, 3,972.93 and 799.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.59 : 3,972.93 = 799.76 : x
2. Step 2: Convert to fraction form
   2,648.59/3,972.93 = 799.76/x
3. Step 3: Cross multiply
   2,648.59x = 3,972.93 × 799.76
4. Step 4: Simplify right side
   2,648.59x = 3,177,390.50
5. Step 5: Solve for x
   x = 3,177,390.50/2,648.59
6. Step 6: Final answer
   x = 1,199.65