Finding the Third Proportional to 3,987,240 and 8,496,432

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,240 : 8,496,432 = 8,496,432 : x
2. Step 2: Convert to fraction form
   3,987,240/8,496,432 = 8,496,432/x
3. Step 3: Cross multiply
   3,987,240x = 8,496,432 × 8,496,432
4. Step 4: Simplify right side
   3,987,240x = 72,189,356,730,624
5. Step 5: Solve for x
   x = 72,189,356,730,624/3,987,240
6. Step 6: Final answer
   x = 18,105,094.43