Finding the Third Proportional to 216,860 and 469,920

Step by Step Solution

1. Step 1: Write the proportion equation
   216,860 : 469,920 = 469,920 : x
2. Step 2: Convert to fraction form
   216,860/469,920 = 469,920/x
3. Step 3: Cross multiply
   216,860x = 469,920 × 469,920
4. Step 4: Simplify right side
   216,860x = 220,824,806,400
5. Step 5: Solve for x
   x = 220,824,806,400/216,860
6. Step 6: Final answer
   x = 1,018,282.79