Finding the Fourth Proportional to 2,648.89, 3,973.85 and 800.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.89 : 3,973.85 = 800.15 : x
2. Step 2: Convert to fraction form
   2,648.89/3,973.85 = 800.15/x
3. Step 3: Cross multiply
   2,648.89x = 3,973.85 × 800.15
4. Step 4: Simplify right side
   2,648.89x = 3,179,676.08
5. Step 5: Solve for x
   x = 3,179,676.08/2,648.89
6. Step 6: Final answer
   x = 1,200.38