Finding the Third Proportional to 12,212 and 28,712

Step by Step Solution

1. Step 1: Write the proportion equation
   12,212 : 28,712 = 28,712 : x
2. Step 2: Convert to fraction form
   12,212/28,712 = 28,712/x
3. Step 3: Cross multiply
   12,212x = 28,712 × 28,712
4. Step 4: Simplify right side
   12,212x = 824,378,944
5. Step 5: Solve for x
   x = 824,378,944/12,212
6. Step 6: Final answer
   x = 67,505.65