Finding the Third Proportional to 9,155,844,949 and 19,636,449,315

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155,844,949 : 19,636,449,315 = 19,636,449,315 : x
2. Step 2: Convert to fraction form
   9,155,844,949/19,636,449,315 = 19,636,449,315/x
3. Step 3: Cross multiply
   9,155,844,949x = 19,636,449,315 × 19,636,449,315
4. Step 4: Simplify right side
   9,155,844,949x = 385,590,141,700,563,992,576
5. Step 5: Solve for x
   x = 385,590,141,700,563,992,576/9,155,844,949
6. Step 6: Final answer
   x = 42,114,096,934.62