Finding the Third Proportional to 39,980 and 60,070

Step by Step Solution

1. Step 1: Write the proportion equation
   39,980 : 60,070 = 60,070 : x
2. Step 2: Convert to fraction form
   39,980/60,070 = 60,070/x
3. Step 3: Cross multiply
   39,980x = 60,070 × 60,070
4. Step 4: Simplify right side
   39,980x = 3,608,404,900
5. Step 5: Solve for x
   x = 3,608,404,900/39,980
6. Step 6: Final answer
   x = 90,255.25