Finding the Third Proportional to 67,681 and 99,211

Step by Step Solution

1. Step 1: Write the proportion equation
   67,681 : 99,211 = 99,211 : x
2. Step 2: Convert to fraction form
   67,681/99,211 = 99,211/x
3. Step 3: Cross multiply
   67,681x = 99,211 × 99,211
4. Step 4: Simplify right side
   67,681x = 9,842,822,521
5. Step 5: Solve for x
   x = 9,842,822,521/67,681
6. Step 6: Final answer
   x = 145,429.63