Finding the Third Proportional to 3,984,390 and 5,980,664

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984,390 : 5,980,664 = 5,980,664 : x
2. Step 2: Convert to fraction form
   3,984,390/5,980,664 = 5,980,664/x
3. Step 3: Cross multiply
   3,984,390x = 5,980,664 × 5,980,664
4. Step 4: Simplify right side
   3,984,390x = 35,768,341,880,896
5. Step 5: Solve for x
   x = 35,768,341,880,896/3,984,390
6. Step 6: Final answer
   x = 8,977,118.68