Finding the Third Proportional to 66,932 and 139,412

Step by Step Solution

1. Step 1: Write the proportion equation
   66,932 : 139,412 = 139,412 : x
2. Step 2: Convert to fraction form
   66,932/139,412 = 139,412/x
3. Step 3: Cross multiply
   66,932x = 139,412 × 139,412
4. Step 4: Simplify right side
   66,932x = 19,435,705,744
5. Step 5: Solve for x
   x = 19,435,705,744/66,932
6. Step 6: Final answer
   x = 290,379.87