Finding the Third Proportional to 70,660 and 99,030

Step by Step Solution

1. Step 1: Write the proportion equation
   70,660 : 99,030 = 99,030 : x
2. Step 2: Convert to fraction form
   70,660/99,030 = 99,030/x
3. Step 3: Cross multiply
   70,660x = 99,030 × 99,030
4. Step 4: Simplify right side
   70,660x = 9,806,940,900
5. Step 5: Solve for x
   x = 9,806,940,900/70,660
6. Step 6: Final answer
   x = 138,790.56