Finding the Third Proportional to 9,996,868,861.50 and 20,821,172,671.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,996,868,861.50 : 20,821,172,671.50 = 20,821,172,671.50 : x
2. Step 2: Convert to fraction form
   9,996,868,861.50/20,821,172,671.50 = 20,821,172,671.50/x
3. Step 3: Cross multiply
   9,996,868,861.50x = 20,821,172,671.50 × 20,821,172,671.50
4. Step 4: Simplify right side
   9,996,868,861.50x = 433,521,231,416,418,435,072
5. Step 5: Solve for x
   x = 433,521,231,416,418,435,072/9,996,868,861.50
6. Step 6: Final answer
   x = 43,365,701,543.41