Finding the Third Proportional to 4,978,517 and 7,688,898

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,517 : 7,688,898 = 7,688,898 : x
2. Step 2: Convert to fraction form
   4,978,517/7,688,898 = 7,688,898/x
3. Step 3: Cross multiply
   4,978,517x = 7,688,898 × 7,688,898
4. Step 4: Simplify right side
   4,978,517x = 59,119,152,454,404
5. Step 5: Solve for x
   x = 59,119,152,454,404/4,978,517
6. Step 6: Final answer
   x = 11,874,851.98