Finding the Third Proportional to 2,798.72 and 3,922.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,798.72 : 3,922.80 = 3,922.80 : x
2. Step 2: Convert to fraction form
   2,798.72/3,922.80 = 3,922.80/x
3. Step 3: Cross multiply
   2,798.72x = 3,922.80 × 3,922.80
4. Step 4: Simplify right side
   2,798.72x = 15,388,396.62
5. Step 5: Solve for x
   x = 15,388,396.62/2,798.72
6. Step 6: Final answer
   x = 5,498.37