Finding the Third Proportional to 361,615.50 and 781,551

Step by Step Solution

1. Step 1: Write the proportion equation
   361,615.50 : 781,551 = 781,551 : x
2. Step 2: Convert to fraction form
   361,615.50/781,551 = 781,551/x
3. Step 3: Cross multiply
   361,615.50x = 781,551 × 781,551
4. Step 4: Simplify right side
   361,615.50x = 610,821,965,601
5. Step 5: Solve for x
   x = 610,821,965,601/361,615.50
6. Step 6: Final answer
   x = 1,689,147.63