Finding the Third Proportional to 21,788 and 34,520

Step by Step Solution

1. Step 1: Write the proportion equation
   21,788 : 34,520 = 34,520 : x
2. Step 2: Convert to fraction form
   21,788/34,520 = 34,520/x
3. Step 3: Cross multiply
   21,788x = 34,520 × 34,520
4. Step 4: Simplify right side
   21,788x = 1,191,630,400
5. Step 5: Solve for x
   x = 1,191,630,400/21,788
6. Step 6: Final answer
   x = 54,692.05