Finding the Third Proportional to 72,678,365.25 and 111,711,681

Step by Step Solution

1. Step 1: Write the proportion equation
   72,678,365.25 : 111,711,681 = 111,711,681 : x
2. Step 2: Convert to fraction form
   72,678,365.25/111,711,681 = 111,711,681/x
3. Step 3: Cross multiply
   72,678,365.25x = 111,711,681 × 111,711,681
4. Step 4: Simplify right side
   72,678,365.25x = 12,479,499,671,845,760
5. Step 5: Solve for x
   x = 12,479,499,671,845,760/72,678,365.25
6. Step 6: Final answer
   x = 171,708,590.71