Finding the Third Proportional to 70,640 and 99,008

Step by Step Solution

1. Step 1: Write the proportion equation
   70,640 : 99,008 = 99,008 : x
2. Step 2: Convert to fraction form
   70,640/99,008 = 99,008/x
3. Step 3: Cross multiply
   70,640x = 99,008 × 99,008
4. Step 4: Simplify right side
   70,640x = 9,802,584,064
5. Step 5: Solve for x
   x = 9,802,584,064/70,640
6. Step 6: Final answer
   x = 138,768.18