Finding the Third Proportional to 218,714 and 469,990

Step by Step Solution

1. Step 1: Write the proportion equation
   218,714 : 469,990 = 469,990 : x
2. Step 2: Convert to fraction form
   218,714/469,990 = 469,990/x
3. Step 3: Cross multiply
   218,714x = 469,990 × 469,990
4. Step 4: Simplify right side
   218,714x = 220,890,600,100
5. Step 5: Solve for x
   x = 220,890,600,100/218,714
6. Step 6: Final answer
   x = 1,009,951.81