Finding the Third Proportional to 139,756 and 209,730

Step by Step Solution

1. Step 1: Write the proportion equation
   139,756 : 209,730 = 209,730 : x
2. Step 2: Convert to fraction form
   139,756/209,730 = 209,730/x
3. Step 3: Cross multiply
   139,756x = 209,730 × 209,730
4. Step 4: Simplify right side
   139,756x = 43,986,672,900
5. Step 5: Solve for x
   x = 43,986,672,900/139,756
6. Step 6: Final answer
   x = 314,739.07