Finding the Third Proportional to 91,919,328 and 139,788,864

Step by Step Solution

1. Step 1: Write the proportion equation
   91,919,328 : 139,788,864 = 139,788,864 : x
2. Step 2: Convert to fraction form
   91,919,328/139,788,864 = 139,788,864/x
3. Step 3: Cross multiply
   91,919,328x = 139,788,864 × 139,788,864
4. Step 4: Simplify right side
   91,919,328x = 19,540,926,498,410,496
5. Step 5: Solve for x
   x = 19,540,926,498,410,496/91,919,328
6. Step 6: Final answer
   x = 212,587,786.74