Finding the Third Proportional to 138,606 and 300,522

Step by Step Solution

1. Step 1: Write the proportion equation
   138,606 : 300,522 = 300,522 : x
2. Step 2: Convert to fraction form
   138,606/300,522 = 300,522/x
3. Step 3: Cross multiply
   138,606x = 300,522 × 300,522
4. Step 4: Simplify right side
   138,606x = 90,313,472,484
5. Step 5: Solve for x
   x = 90,313,472,484/138,606
6. Step 6: Final answer
   x = 651,584.15