Finding the Third Proportional to 647,993.50 and 872,328.50

Step by Step Solution

1. Step 1: Write the proportion equation
   647,993.50 : 872,328.50 = 872,328.50 : x
2. Step 2: Convert to fraction form
   647,993.50/872,328.50 = 872,328.50/x
3. Step 3: Cross multiply
   647,993.50x = 872,328.50 × 872,328.50
4. Step 4: Simplify right side
   647,993.50x = 760,957,011,912.25
5. Step 5: Solve for x
   x = 760,957,011,912.25/647,993.50
6. Step 6: Final answer
   x = 1,174,328.16