Finding the Third Proportional to 3,932,742,171.38 and 8,426,436,311.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,932,742,171.38 : 8,426,436,311.25 = 8,426,436,311.25 : x
2. Step 2: Convert to fraction form
   3,932,742,171.38/8,426,436,311.25 = 8,426,436,311.25/x
3. Step 3: Cross multiply
   3,932,742,171.38x = 8,426,436,311.25 × 8,426,436,311.25
4. Step 4: Simplify right side
   3,932,742,171.38x = 71,004,828,907,552,505,856
5. Step 5: Solve for x
   x = 71,004,828,907,552,505,856/3,932,742,171.38
6. Step 6: Final answer
   x = 18,054,788,697.91