Finding the Third Proportional to 8,429.06 and 13,221.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.06 : 13,221.56 = 13,221.56 : x
2. Step 2: Convert to fraction form
   8,429.06/13,221.56 = 13,221.56/x
3. Step 3: Cross multiply
   8,429.06x = 13,221.56 × 13,221.56
4. Step 4: Simplify right side
   8,429.06x = 174,809,714.94
5. Step 5: Solve for x
   x = 174,809,714.94/8,429.06
6. Step 6: Final answer
   x = 20,738.93