Finding the Third Proportional to 13,408.03 and 20,920.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,408.03 : 20,920.78 = 20,920.78 : x
2. Step 2: Convert to fraction form
   13,408.03/20,920.78 = 20,920.78/x
3. Step 3: Cross multiply
   13,408.03x = 20,920.78 × 20,920.78
4. Step 4: Simplify right side
   13,408.03x = 437,679,088.11
5. Step 5: Solve for x
   x = 437,679,088.11/13,408.03
6. Step 6: Final answer
   x = 32,643.05