Finding the Third Proportional to 207,048 and 282,870

Step by Step Solution

1. Step 1: Write the proportion equation
   207,048 : 282,870 = 282,870 : x
2. Step 2: Convert to fraction form
   207,048/282,870 = 282,870/x
3. Step 3: Cross multiply
   207,048x = 282,870 × 282,870
4. Step 4: Simplify right side
   207,048x = 80,015,436,900
5. Step 5: Solve for x
   x = 80,015,436,900/207,048
6. Step 6: Final answer
   x = 386,458.39