Finding the Third Proportional to 30,801 and 65,490

Step by Step Solution

1. Step 1: Write the proportion equation
   30,801 : 65,490 = 65,490 : x
2. Step 2: Convert to fraction form
   30,801/65,490 = 65,490/x
3. Step 3: Cross multiply
   30,801x = 65,490 × 65,490
4. Step 4: Simplify right side
   30,801x = 4,288,940,100
5. Step 5: Solve for x
   x = 4,288,940,100/30,801
6. Step 6: Final answer
   x = 139,246.78