Finding the Third Proportional to 1,816.80 and 2,778.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.80 : 2,778.89 = 2,778.89 : x
2. Step 2: Convert to fraction form
   1,816.80/2,778.89 = 2,778.89/x
3. Step 3: Cross multiply
   1,816.80x = 2,778.89 × 2,778.89
4. Step 4: Simplify right side
   1,816.80x = 7,722,233.11
5. Step 5: Solve for x
   x = 7,722,233.11/1,816.80
6. Step 6: Final answer
   x = 4,250.45