Finding the Third Proportional to 8,490 and 20,065

Step by Step Solution

1. Step 1: Write the proportion equation
   8,490 : 20,065 = 20,065 : x
2. Step 2: Convert to fraction form
   8,490/20,065 = 20,065/x
3. Step 3: Cross multiply
   8,490x = 20,065 × 20,065
4. Step 4: Simplify right side
   8,490x = 402,604,225
5. Step 5: Solve for x
   x = 402,604,225/8,490
6. Step 6: Final answer
   x = 47,420.99