Finding the Third Proportional to 72,678,366 and 111,711,654

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,366 : 111,711,654 = 111,711,654 : x
2. Step 2: Convert to fraction form
   72,678,366/111,711,654 = 111,711,654/x
3. Step 3: Cross multiply
   72,678,366x = 111,711,654 × 111,711,654
4. Step 4: Simplify right side
   72,678,366x = 12,479,493,639,415,716
5. Step 5: Solve for x
   x = 12,479,493,639,415,716/72,678,366
6. Step 6: Final answer
   x = 171,708,505.93