Finding the Third Proportional to 70,389 and 103,621

Step by Step Solution

1. Step 1: Write the proportion equation
   70,389 : 103,621 = 103,621 : x
2. Step 2: Convert to fraction form
   70,389/103,621 = 103,621/x
3. Step 3: Cross multiply
   70,389x = 103,621 × 103,621
4. Step 4: Simplify right side
   70,389x = 10,737,311,641
5. Step 5: Solve for x
   x = 10,737,311,641/70,389
6. Step 6: Final answer
   x = 152,542.47