Finding the Third Proportional to 138,915 and 303,870

Step by Step Solution

1. Step 1: Write the proportion equation
   138,915 : 303,870 = 303,870 : x
2. Step 2: Convert to fraction form
   138,915/303,870 = 303,870/x
3. Step 3: Cross multiply
   138,915x = 303,870 × 303,870
4. Step 4: Simplify right side
   138,915x = 92,336,976,900
5. Step 5: Solve for x
   x = 92,336,976,900/138,915
6. Step 6: Final answer
   x = 664,701.27