Finding the Third Proportional to 4,978,494 and 7,688,867

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,494 : 7,688,867 = 7,688,867 : x
2. Step 2: Convert to fraction form
   4,978,494/7,688,867 = 7,688,867/x
3. Step 3: Cross multiply
   4,978,494x = 7,688,867 × 7,688,867
4. Step 4: Simplify right side
   4,978,494x = 59,118,675,743,689
5. Step 5: Solve for x
   x = 59,118,675,743,689/4,978,494
6. Step 6: Final answer
   x = 11,874,811.09