Finding the Third Proportional to 65,021,400 and 89,162,640

Step by Step Solution

1. Step 1: Write the proportion equation
   65,021,400 : 89,162,640 = 89,162,640 : x
2. Step 2: Convert to fraction form
   65,021,400/89,162,640 = 89,162,640/x
3. Step 3: Cross multiply
   65,021,400x = 89,162,640 × 89,162,640
4. Step 4: Simplify right side
   65,021,400x = 7,949,976,371,769,600
5. Step 5: Solve for x
   x = 7,949,976,371,769,600/65,021,400
6. Step 6: Final answer
   x = 122,267,074.71