Finding the Third Proportional to 72,678,384 and 111,711,690

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,384 : 111,711,690 = 111,711,690 : x
2. Step 2: Convert to fraction form
   72,678,384/111,711,690 = 111,711,690/x
3. Step 3: Cross multiply
   72,678,384x = 111,711,690 × 111,711,690
4. Step 4: Simplify right side
   72,678,384x = 12,479,501,682,656,100
5. Step 5: Solve for x
   x = 12,479,501,682,656,100/72,678,384
6. Step 6: Final answer
   x = 171,708,574.07