Finding the Third Proportional to 12,789 and 22,221

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789 : 22,221 = 22,221 : x
2. Step 2: Convert to fraction form
   12,789/22,221 = 22,221/x
3. Step 3: Cross multiply
   12,789x = 22,221 × 22,221
4. Step 4: Simplify right side
   12,789x = 493,772,841
5. Step 5: Solve for x
   x = 493,772,841/12,789
6. Step 6: Final answer
   x = 38,609.18