Finding the Third Proportional to 17,958 and 39,180

Step by Step Solution

1. Step 1: Write the proportion equation
   17,958 : 39,180 = 39,180 : x
2. Step 2: Convert to fraction form
   17,958/39,180 = 39,180/x
3. Step 3: Cross multiply
   17,958x = 39,180 × 39,180
4. Step 4: Simplify right side
   17,958x = 1,535,072,400
5. Step 5: Solve for x
   x = 1,535,072,400/17,958
6. Step 6: Final answer
   x = 85,481.26