Finding the Third Proportional to 17,618 and 37,990

Step by Step Solution

1. Step 1: Write the proportion equation
   17,618 : 37,990 = 37,990 : x
2. Step 2: Convert to fraction form
   17,618/37,990 = 37,990/x
3. Step 3: Cross multiply
   17,618x = 37,990 × 37,990
4. Step 4: Simplify right side
   17,618x = 1,443,240,100
5. Step 5: Solve for x
   x = 1,443,240,100/17,618
6. Step 6: Final answer
   x = 81,918.50