Finding the Third Proportional to 220,304 and 350,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   220,304 : 350,139.50 = 350,139.50 : x
2. Step 2: Convert to fraction form
   220,304/350,139.50 = 350,139.50/x
3. Step 3: Cross multiply
   220,304x = 350,139.50 × 350,139.50
4. Step 4: Simplify right side
   220,304x = 122,597,669,460.25
5. Step 5: Solve for x
   x = 122,597,669,460.25/220,304
6. Step 6: Final answer
   x = 556,493.16