Finding the Fourth Proportional to 2,648.81, 3,973.28 and 799.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.81 : 3,973.28 = 799.98 : x
2. Step 2: Convert to fraction form
   2,648.81/3,973.28 = 799.98/x
3. Step 3: Cross multiply
   2,648.81x = 3,973.28 × 799.98
4. Step 4: Simplify right side
   2,648.81x = 3,178,540.53
5. Step 5: Solve for x
   x = 3,178,540.53/2,648.81
6. Step 6: Final answer
   x = 1,199.99