Finding the Third Proportional to 72,678,360 and 111,711,673.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,360 : 111,711,673.50 = 111,711,673.50 : x
2. Step 2: Convert to fraction form
   72,678,360/111,711,673.50 = 111,711,673.50/x
3. Step 3: Cross multiply
   72,678,360x = 111,711,673.50 × 111,711,673.50
4. Step 4: Simplify right side
   72,678,360x = 12,479,497,996,170,602
5. Step 5: Solve for x
   x = 12,479,497,996,170,602/72,678,360
6. Step 6: Final answer
   x = 171,708,580.05