Finding the Third Proportional to 60,699 and 70,815

Step by Step Solution

1. Step 1: Write the proportion equation
   60,699 : 70,815 = 70,815 : x
2. Step 2: Convert to fraction form
   60,699/70,815 = 70,815/x
3. Step 3: Cross multiply
   60,699x = 70,815 × 70,815
4. Step 4: Simplify right side
   60,699x = 5,014,764,225
5. Step 5: Solve for x
   x = 5,014,764,225/60,699
6. Step 6: Final answer
   x = 82,616.92