Finding the Third Proportional to 287,563.50 and 435,375

Step by Step Solution

1. Step 1: Write the proportion equation
   287,563.50 : 435,375 = 435,375 : x
2. Step 2: Convert to fraction form
   287,563.50/435,375 = 435,375/x
3. Step 3: Cross multiply
   287,563.50x = 435,375 × 435,375
4. Step 4: Simplify right side
   287,563.50x = 189,551,390,625
5. Step 5: Solve for x
   x = 189,551,390,625/287,563.50
6. Step 6: Final answer
   x = 659,163.60