Finding the Third Proportional to 18,965,559,472 and 42,171,518,528

Step by Step Solution

1. Step 1: Write the proportion equation
   18,965,559,472 : 42,171,518,528 = 42,171,518,528 : x
2. Step 2: Convert to fraction form
   18,965,559,472/42,171,518,528 = 42,171,518,528/x
3. Step 3: Cross multiply
   18,965,559,472x = 42,171,518,528 × 42,171,518,528
4. Step 4: Simplify right side
   18,965,559,472x = 1,778,436,974,957,447,348,224
5. Step 5: Solve for x
   x = 1,778,436,974,957,447,348,224/18,965,559,472
6. Step 6: Final answer
   x = 93,771,922,604.40