Finding the Third Proportional to 3,861,590 and 8,321,212

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861,590 : 8,321,212 = 8,321,212 : x
2. Step 2: Convert to fraction form
   3,861,590/8,321,212 = 8,321,212/x
3. Step 3: Cross multiply
   3,861,590x = 8,321,212 × 8,321,212
4. Step 4: Simplify right side
   3,861,590x = 69,242,569,148,944
5. Step 5: Solve for x
   x = 69,242,569,148,944/3,861,590
6. Step 6: Final answer
   x = 17,931,103.29