Finding the Third Proportional to 6,931.50 and 12,189

Step by Step Solution

1. Step 1: Write the proportion equation
   6,931.50 : 12,189 = 12,189 : x
2. Step 2: Convert to fraction form
   6,931.50/12,189 = 12,189/x
3. Step 3: Cross multiply
   6,931.50x = 12,189 × 12,189
4. Step 4: Simplify right side
   6,931.50x = 148,571,721
5. Step 5: Solve for x
   x = 148,571,721/6,931.50
6. Step 6: Final answer
   x = 21,434.28