Finding the Fourth Proportional to 2,648.69, 3,973.82 and 799.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.69 : 3,973.82 = 799.86 : x
2. Step 2: Convert to fraction form
   2,648.69/3,973.82 = 799.86/x
3. Step 3: Cross multiply
   2,648.69x = 3,973.82 × 799.86
4. Step 4: Simplify right side
   2,648.69x = 3,178,495.67
5. Step 5: Solve for x
   x = 3,178,495.67/2,648.69
6. Step 6: Final answer
   x = 1,200.03