Finding the Third Proportional to 72,678,343 and 111,711,619

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,343 : 111,711,619 = 111,711,619 : x
2. Step 2: Convert to fraction form
   72,678,343/111,711,619 = 111,711,619/x
3. Step 3: Cross multiply
   72,678,343x = 111,711,619 × 111,711,619
4. Step 4: Simplify right side
   72,678,343x = 12,479,485,819,601,160
5. Step 5: Solve for x
   x = 12,479,485,819,601,160/72,678,343
6. Step 6: Final answer
   x = 171,708,452.68