Finding the Third Proportional to 72,678,357.42 and 111,711,669.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,357.42 : 111,711,669.54 = 111,711,669.54 : x
2. Step 2: Convert to fraction form
   72,678,357.42/111,711,669.54 = 111,711,669.54/x
3. Step 3: Cross multiply
   72,678,357.42x = 111,711,669.54 × 111,711,669.54
4. Step 4: Simplify right side
   72,678,357.42x = 12,479,497,111,204,146
5. Step 5: Solve for x
   x = 12,479,497,111,204,146/72,678,357.42
6. Step 6: Final answer
   x = 171,708,573.97