Finding the Third Proportional to 91,919,336 and 139,788,876

Step by Step Solution

1. Step 1: Write the proportion equation
   91,919,336 : 139,788,876 = 139,788,876 : x
2. Step 2: Convert to fraction form
   91,919,336/139,788,876 = 139,788,876/x
3. Step 3: Cross multiply
   91,919,336x = 139,788,876 × 139,788,876
4. Step 4: Simplify right side
   91,919,336x = 19,540,929,853,343,376
5. Step 5: Solve for x
   x = 19,540,929,853,343,376/91,919,336
6. Step 6: Final answer
   x = 212,587,804.74