Finding the Third Proportional to 18,965,559,474 and 42,171,518,532

Step by Step Solution

1. Step 1: Write the proportion equation
   18,965,559,474 : 42,171,518,532 = 42,171,518,532 : x
2. Step 2: Convert to fraction form
   18,965,559,474/42,171,518,532 = 42,171,518,532/x
3. Step 3: Cross multiply
   18,965,559,474x = 42,171,518,532 × 42,171,518,532
4. Step 4: Simplify right side
   18,965,559,474x = 1,778,436,975,294,819,336,192
5. Step 5: Solve for x
   x = 1,778,436,975,294,819,336,192/18,965,559,474
6. Step 6: Final answer
   x = 93,771,922,612.30