Finding the Third Proportional to 9,155,844,947 and 19,636,449,311

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155,844,947 : 19,636,449,311 = 19,636,449,311 : x
2. Step 2: Convert to fraction form
   9,155,844,947/19,636,449,311 = 19,636,449,311/x
3. Step 3: Cross multiply
   9,155,844,947x = 19,636,449,311 × 19,636,449,311
4. Step 4: Simplify right side
   9,155,844,947x = 385,590,141,543,472,365,568
5. Step 5: Solve for x
   x = 385,590,141,543,472,365,568/9,155,844,947
6. Step 6: Final answer
   x = 42,114,096,926.66