Finding the Third Proportional to 8,114.75 and 12,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,114.75 : 12,139.69 = 12,139.69 : x
2. Step 2: Convert to fraction form
   8,114.75/12,139.69 = 12,139.69/x
3. Step 3: Cross multiply
   8,114.75x = 12,139.69 × 12,139.69
4. Step 4: Simplify right side
   8,114.75x = 147,372,123.74
5. Step 5: Solve for x
   x = 147,372,123.74/8,114.75
6. Step 6: Final answer
   x = 18,161.01