Finding the Third Proportional to 18,978,431,877 and 39,527,697,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,978,431,877 : 39,527,697,280.50 = 39,527,697,280.50 : x
2. Step 2: Convert to fraction form
   18,978,431,877/39,527,697,280.50 = 39,527,697,280.50/x
3. Step 3: Cross multiply
   18,978,431,877x = 39,527,697,280.50 × 39,527,697,280.50
4. Step 4: Simplify right side
   18,978,431,877x = 1,562,438,852,298,847,027,200
5. Step 5: Solve for x
   x = 1,562,438,852,298,847,027,200/18,978,431,877
6. Step 6: Final answer
   x = 82,327,078,571.35