Finding the Third Proportional to 91,919,256 and 139,788,756

Step by Step Solution

1. Step 1: Write the proportion equation
   91,919,256 : 139,788,756 = 139,788,756 : x
2. Step 2: Convert to fraction form
   91,919,256/139,788,756 = 139,788,756/x
3. Step 3: Cross multiply
   91,919,256x = 139,788,756 × 139,788,756
4. Step 4: Simplify right side
   91,919,256x = 19,540,896,304,027,536
5. Step 5: Solve for x
   x = 19,540,896,304,027,536/91,919,256
6. Step 6: Final answer
   x = 212,587,624.77