Finding the Third Proportional to 65,072 and 88,390

Step by Step Solution

1. Step 1: Write the proportion equation
   65,072 : 88,390 = 88,390 : x
2. Step 2: Convert to fraction form
   65,072/88,390 = 88,390/x
3. Step 3: Cross multiply
   65,072x = 88,390 × 88,390
4. Step 4: Simplify right side
   65,072x = 7,812,792,100
5. Step 5: Solve for x
   x = 7,812,792,100/65,072
6. Step 6: Final answer
   x = 120,063.81