Finding the Third Proportional to 72,678,380 and 111,711,675

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,380 : 111,711,675 = 111,711,675 : x
2. Step 2: Convert to fraction form
   72,678,380/111,711,675 = 111,711,675/x
3. Step 3: Cross multiply
   72,678,380x = 111,711,675 × 111,711,675
4. Step 4: Simplify right side
   72,678,380x = 12,479,498,331,305,624
5. Step 5: Solve for x
   x = 12,479,498,331,305,624/72,678,380
6. Step 6: Final answer
   x = 171,708,537.41