Finding the Third Proportional to 18,644,013,339 and 39,947,357,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,644,013,339 : 39,947,357,443.50 = 39,947,357,443.50 : x
2. Step 2: Convert to fraction form
   18,644,013,339/39,947,357,443.50 = 39,947,357,443.50/x
3. Step 3: Cross multiply
   18,644,013,339x = 39,947,357,443.50 × 39,947,357,443.50
4. Step 4: Simplify right side
   18,644,013,339x = 1,595,791,366,718,754,914,304
5. Step 5: Solve for x
   x = 1,595,791,366,718,754,914,304/18,644,013,339
6. Step 6: Final answer
   x = 85,592,696,041.50