Finding the Third Proportional to 139,042.50 and 303,600

Step by Step Solution

1. Step 1: Write the proportion equation
   139,042.50 : 303,600 = 303,600 : x
2. Step 2: Convert to fraction form
   139,042.50/303,600 = 303,600/x
3. Step 3: Cross multiply
   139,042.50x = 303,600 × 303,600
4. Step 4: Simplify right side
   139,042.50x = 92,172,960,000
5. Step 5: Solve for x
   x = 92,172,960,000/139,042.50
6. Step 6: Final answer
   x = 662,912.13