Finding the Third Proportional to 91,919,330 and 139,788,867

Step by Step Solution

1. Step 1: Write the proportion equation
   91,919,330 : 139,788,867 = 139,788,867 : x
2. Step 2: Convert to fraction form
   91,919,330/139,788,867 = 139,788,867/x
3. Step 3: Cross multiply
   91,919,330x = 139,788,867 × 139,788,867
4. Step 4: Simplify right side
   91,919,330x = 19,540,927,337,143,688
5. Step 5: Solve for x
   x = 19,540,927,337,143,688/91,919,330
6. Step 6: Final answer
   x = 212,587,791.24