Finding the Third Proportional to 67,021 and 139,554

Step by Step Solution

1. Step 1: Write the proportion equation
   67,021 : 139,554 = 139,554 : x
2. Step 2: Convert to fraction form
   67,021/139,554 = 139,554/x
3. Step 3: Cross multiply
   67,021x = 139,554 × 139,554
4. Step 4: Simplify right side
   67,021x = 19,475,318,916
5. Step 5: Solve for x
   x = 19,475,318,916/67,021
6. Step 6: Final answer
   x = 290,585.32