Finding the Third Proportional to 17,912 and 39,105

Step by Step Solution

1. Step 1: Write the proportion equation
   17,912 : 39,105 = 39,105 : x
2. Step 2: Convert to fraction form
   17,912/39,105 = 39,105/x
3. Step 3: Cross multiply
   17,912x = 39,105 × 39,105
4. Step 4: Simplify right side
   17,912x = 1,529,201,025
5. Step 5: Solve for x
   x = 1,529,201,025/17,912
6. Step 6: Final answer
   x = 85,372.99