Finding the Third Proportional to 13,674.38 and 20,488.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,674.38 : 20,488.78 = 20,488.78 : x
2. Step 2: Convert to fraction form
   13,674.38/20,488.78 = 20,488.78/x
3. Step 3: Cross multiply
   13,674.38x = 20,488.78 × 20,488.78
4. Step 4: Simplify right side
   13,674.38x = 419,790,157.11
5. Step 5: Solve for x
   x = 419,790,157.11/13,674.38
6. Step 6: Final answer
   x = 30,699.04