Finding the Third Proportional to 19,723,413,208 and 42,239,491,281

Step by Step Solution

1. Step 1: Write the proportion equation
   19,723,413,208 : 42,239,491,281 = 42,239,491,281 : x
2. Step 2: Convert to fraction form
   19,723,413,208/42,239,491,281 = 42,239,491,281/x
3. Step 3: Cross multiply
   19,723,413,208x = 42,239,491,281 × 42,239,491,281
4. Step 4: Simplify right side
   19,723,413,208x = 1,784,174,623,677,674,946,560
5. Step 5: Solve for x
   x = 1,784,174,623,677,674,946,560/19,723,413,208
6. Step 6: Final answer
   x = 90,459,729,503.31