Finding the Third Proportional to 6,221.81 and 13,309.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,221.81 : 13,309.31 = 13,309.31 : x
2. Step 2: Convert to fraction form
   6,221.81/13,309.31 = 13,309.31/x
3. Step 3: Cross multiply
   6,221.81x = 13,309.31 × 13,309.31
4. Step 4: Simplify right side
   6,221.81x = 177,137,799.22
5. Step 5: Solve for x
   x = 177,137,799.22/6,221.81
6. Step 6: Final answer
   x = 28,470.45