Finding the Third Proportional to 72,678,364 and 111,711,680

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,364 : 111,711,680 = 111,711,680 : x
2. Step 2: Convert to fraction form
   72,678,364/111,711,680 = 111,711,680/x
3. Step 3: Cross multiply
   72,678,364x = 111,711,680 × 111,711,680
4. Step 4: Simplify right side
   72,678,364x = 12,479,499,448,422,400
5. Step 5: Solve for x
   x = 12,479,499,448,422,400/72,678,364
6. Step 6: Final answer
   x = 171,708,590.58