Finding the Third Proportional to 3,931,362 and 8,409,231

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931,362 : 8,409,231 = 8,409,231 : x
2. Step 2: Convert to fraction form
   3,931,362/8,409,231 = 8,409,231/x
3. Step 3: Cross multiply
   3,931,362x = 8,409,231 × 8,409,231
4. Step 4: Simplify right side
   3,931,362x = 70,715,166,011,361
5. Step 5: Solve for x
   x = 70,715,166,011,361/3,931,362
6. Step 6: Final answer
   x = 17,987,447.10