Finding the Third Proportional to 13,218.19 and 20,629.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,218.19 : 20,629.69 = 20,629.69 : x
2. Step 2: Convert to fraction form
   13,218.19/20,629.69 = 20,629.69/x
3. Step 3: Cross multiply
   13,218.19x = 20,629.69 × 20,629.69
4. Step 4: Simplify right side
   13,218.19x = 425,584,006.35
5. Step 5: Solve for x
   x = 425,584,006.35/13,218.19
6. Step 6: Final answer
   x = 32,196.85