Finding the Third Proportional to 10,809.28 and 13,811.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,809.28 : 13,811.77 = 13,811.77 : x
2. Step 2: Convert to fraction form
   10,809.28/13,811.77 = 13,811.77/x
3. Step 3: Cross multiply
   10,809.28x = 13,811.77 × 13,811.77
4. Step 4: Simplify right side
   10,809.28x = 190,764,869.68
5. Step 5: Solve for x
   x = 190,764,869.68/10,809.28
6. Step 6: Final answer
   x = 17,648.25