Finding the Third Proportional to 12,429 and 29,112

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429 : 29,112 = 29,112 : x
2. Step 2: Convert to fraction form
   12,429/29,112 = 29,112/x
3. Step 3: Cross multiply
   12,429x = 29,112 × 29,112
4. Step 4: Simplify right side
   12,429x = 847,508,544
5. Step 5: Solve for x
   x = 847,508,544/12,429
6. Step 6: Final answer
   x = 68,187.99