Finding the Third Proportional to 287,710.50 and 435,564

Step by Step Solution

1. Step 1: Write the proportion equation
   287,710.50 : 435,564 = 435,564 : x
2. Step 2: Convert to fraction form
   287,710.50/435,564 = 435,564/x
3. Step 3: Cross multiply
   287,710.50x = 435,564 × 435,564
4. Step 4: Simplify right side
   287,710.50x = 189,715,998,096
5. Step 5: Solve for x
   x = 189,715,998,096/287,710.50
6. Step 6: Final answer
   x = 659,398.94