Finding the Third Proportional to 139,459.50 and 304,839

Step by Step Solution

1. Step 1: Write the proportion equation
   139,459.50 : 304,839 = 304,839 : x
2. Step 2: Convert to fraction form
   139,459.50/304,839 = 304,839/x
3. Step 3: Cross multiply
   139,459.50x = 304,839 × 304,839
4. Step 4: Simplify right side
   139,459.50x = 92,926,815,921
5. Step 5: Solve for x
   x = 92,926,815,921/139,459.50
6. Step 6: Final answer
   x = 666,335.50