Finding the Third Proportional to 21,820 and 34,860

Step by Step Solution

1. Step 1: Write the proportion equation
   21,820 : 34,860 = 34,860 : x
2. Step 2: Convert to fraction form
   21,820/34,860 = 34,860/x
3. Step 3: Cross multiply
   21,820x = 34,860 × 34,860
4. Step 4: Simplify right side
   21,820x = 1,215,219,600
5. Step 5: Solve for x
   x = 1,215,219,600/21,820
6. Step 6: Final answer
   x = 55,692.92