Finding the Third Proportional to 3,953,880 and 8,632,872

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953,880 : 8,632,872 = 8,632,872 : x
2. Step 2: Convert to fraction form
   3,953,880/8,632,872 = 8,632,872/x
3. Step 3: Cross multiply
   3,953,880x = 8,632,872 × 8,632,872
4. Step 4: Simplify right side
   3,953,880x = 74,526,478,968,384
5. Step 5: Solve for x
   x = 74,526,478,968,384/3,953,880
6. Step 6: Final answer
   x = 18,848,948.11