Finding the Third Proportional to 219,892 and 298,710

Step by Step Solution

1. Step 1: Write the proportion equation
   219,892 : 298,710 = 298,710 : x
2. Step 2: Convert to fraction form
   219,892/298,710 = 298,710/x
3. Step 3: Cross multiply
   219,892x = 298,710 × 298,710
4. Step 4: Simplify right side
   219,892x = 89,227,664,100
5. Step 5: Solve for x
   x = 89,227,664,100/219,892
6. Step 6: Final answer
   x = 405,779.49