Finding the Third Proportional to 17,980 and 38,960

Step by Step Solution

1. Step 1: Write the proportion equation
   17,980 : 38,960 = 38,960 : x
2. Step 2: Convert to fraction form
   17,980/38,960 = 38,960/x
3. Step 3: Cross multiply
   17,980x = 38,960 × 38,960
4. Step 4: Simplify right side
   17,980x = 1,517,881,600
5. Step 5: Solve for x
   x = 1,517,881,600/17,980
6. Step 6: Final answer
   x = 84,420.56