Finding the Third Proportional to 13,171.36 and 20,818.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,171.36 : 20,818.90 = 20,818.90 : x
2. Step 2: Convert to fraction form
   13,171.36/20,818.90 = 20,818.90/x
3. Step 3: Cross multiply
   13,171.36x = 20,818.90 × 20,818.90
4. Step 4: Simplify right side
   13,171.36x = 433,426,532.15
5. Step 5: Solve for x
   x = 433,426,532.15/13,171.36
6. Step 6: Final answer
   x = 32,906.74