Finding the Third Proportional to 17,940 and 38,990

Step by Step Solution

1. Step 1: Write the proportion equation
   17,940 : 38,990 = 38,990 : x
2. Step 2: Convert to fraction form
   17,940/38,990 = 38,990/x
3. Step 3: Cross multiply
   17,940x = 38,990 × 38,990
4. Step 4: Simplify right side
   17,940x = 1,520,220,100
5. Step 5: Solve for x
   x = 1,520,220,100/17,940
6. Step 6: Final answer
   x = 84,739.14