Finding the Third Proportional to 72,678,369 and 111,711,687

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,369 : 111,711,687 = 111,711,687 : x
2. Step 2: Convert to fraction form
   72,678,369/111,711,687 = 111,711,687/x
3. Step 3: Cross multiply
   72,678,369x = 111,711,687 × 111,711,687
4. Step 4: Simplify right side
   72,678,369x = 12,479,501,012,385,968
5. Step 5: Solve for x
   x = 12,479,501,012,385,968/72,678,369
6. Step 6: Final answer
   x = 171,708,600.29