Finding the Third Proportional to 304,839 and 434,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   304,839 : 434,839.50 = 434,839.50 : x
2. Step 2: Convert to fraction form
   304,839/434,839.50 = 434,839.50/x
3. Step 3: Cross multiply
   304,839x = 434,839.50 × 434,839.50
4. Step 4: Simplify right side
   304,839x = 189,085,390,760.25
5. Step 5: Solve for x
   x = 189,085,390,760.25/304,839
6. Step 6: Final answer
   x = 620,279.53