Finding the Third Proportional to 351,389.50 and 770,495

Step by Step Solution

1. Step 1: Write the proportion equation
   351,389.50 : 770,495 = 770,495 : x
2. Step 2: Convert to fraction form
   351,389.50/770,495 = 770,495/x
3. Step 3: Cross multiply
   351,389.50x = 770,495 × 770,495
4. Step 4: Simplify right side
   351,389.50x = 593,662,545,025
5. Step 5: Solve for x
   x = 593,662,545,025/351,389.50
6. Step 6: Final answer
   x = 1,689,471.50