Finding the Third Proportional to 216,270 and 497,790

Step by Step Solution

1. Step 1: Write the proportion equation
   216,270 : 497,790 = 497,790 : x
2. Step 2: Convert to fraction form
   216,270/497,790 = 497,790/x
3. Step 3: Cross multiply
   216,270x = 497,790 × 497,790
4. Step 4: Simplify right side
   216,270x = 247,794,884,100
5. Step 5: Solve for x
   x = 247,794,884,100/216,270
6. Step 6: Final answer
   x = 1,145,766.33