Finding the Third Proportional to 148,359 and 321,339

Step by Step Solution

1. Step 1: Write the proportion equation
   148,359 : 321,339 = 321,339 : x
2. Step 2: Convert to fraction form
   148,359/321,339 = 321,339/x
3. Step 3: Cross multiply
   148,359x = 321,339 × 321,339
4. Step 4: Simplify right side
   148,359x = 103,258,752,921
5. Step 5: Solve for x
   x = 103,258,752,921/148,359
6. Step 6: Final answer
   x = 696,005.99