Finding the Third Proportional to 287,942.50 and 620,035

Step by Step Solution

1. Step 1: Write the proportion equation
   287,942.50 : 620,035 = 620,035 : x
2. Step 2: Convert to fraction form
   287,942.50/620,035 = 620,035/x
3. Step 3: Cross multiply
   287,942.50x = 620,035 × 620,035
4. Step 4: Simplify right side
   287,942.50x = 384,443,401,225
5. Step 5: Solve for x
   x = 384,443,401,225/287,942.50
6. Step 6: Final answer
   x = 1,335,139.49