Finding the Third Proportional to 220,648 and 340,956

Step by Step Solution

1. Step 1: Write the proportion equation
   220,648 : 340,956 = 340,956 : x
2. Step 2: Convert to fraction form
   220,648/340,956 = 340,956/x
3. Step 3: Cross multiply
   220,648x = 340,956 × 340,956
4. Step 4: Simplify right side
   220,648x = 116,250,993,936
5. Step 5: Solve for x
   x = 116,250,993,936/220,648
6. Step 6: Final answer
   x = 526,861.76