Finding the Third Proportional to 31,213 and 67,718

Step by Step Solution

1. Step 1: Write the proportion equation
   31,213 : 67,718 = 67,718 : x
2. Step 2: Convert to fraction form
   31,213/67,718 = 67,718/x
3. Step 3: Cross multiply
   31,213x = 67,718 × 67,718
4. Step 4: Simplify right side
   31,213x = 4,585,727,524
5. Step 5: Solve for x
   x = 4,585,727,524/31,213
6. Step 6: Final answer
   x = 146,917.23