Finding the Third Proportional to 17,908 and 39,140

Step by Step Solution

1. Step 1: Write the proportion equation
   17,908 : 39,140 = 39,140 : x
2. Step 2: Convert to fraction form
   17,908/39,140 = 39,140/x
3. Step 3: Cross multiply
   17,908x = 39,140 × 39,140
4. Step 4: Simplify right side
   17,908x = 1,531,939,600
5. Step 5: Solve for x
   x = 1,531,939,600/17,908
6. Step 6: Final answer
   x = 85,544.99