Finding the Third Proportional to 138,608 and 300,526

Step by Step Solution

1. Step 1: Write the proportion equation
   138,608 : 300,526 = 300,526 : x
2. Step 2: Convert to fraction form
   138,608/300,526 = 300,526/x
3. Step 3: Cross multiply
   138,608x = 300,526 × 300,526
4. Step 4: Simplify right side
   138,608x = 90,315,876,676
5. Step 5: Solve for x
   x = 90,315,876,676/138,608
6. Step 6: Final answer
   x = 651,592.09