Finding the Third Proportional to 2,817.28 and 5,816.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.28 : 5,816.81 = 5,816.81 : x
2. Step 2: Convert to fraction form
   2,817.28/5,816.81 = 5,816.81/x
3. Step 3: Cross multiply
   2,817.28x = 5,816.81 × 5,816.81
4. Step 4: Simplify right side
   2,817.28x = 33,835,307.66
5. Step 5: Solve for x
   x = 33,835,307.66/2,817.28
6. Step 6: Final answer
   x = 12,009.91