Finding the Third Proportional to 12,658.78 and 20,446.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658.78 : 20,446.17 = 20,446.17 : x
2. Step 2: Convert to fraction form
   12,658.78/20,446.17 = 20,446.17/x
3. Step 3: Cross multiply
   12,658.78x = 20,446.17 × 20,446.17
4. Step 4: Simplify right side
   12,658.78x = 418,045,944.34
5. Step 5: Solve for x
   x = 418,045,944.34/12,658.78
6. Step 6: Final answer
   x = 33,024.19