Finding the Third Proportional to 12,931 and 19,967

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931 : 19,967 = 19,967 : x
2. Step 2: Convert to fraction form
   12,931/19,967 = 19,967/x
3. Step 3: Cross multiply
   12,931x = 19,967 × 19,967
4. Step 4: Simplify right side
   12,931x = 398,681,089
5. Step 5: Solve for x
   x = 398,681,089/12,931
6. Step 6: Final answer
   x = 30,831.42