Finding the Third Proportional to 465,543 and 689,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   465,543 : 689,581.50 = 689,581.50 : x
2. Step 2: Convert to fraction form
   465,543/689,581.50 = 689,581.50/x
3. Step 3: Cross multiply
   465,543x = 689,581.50 × 689,581.50
4. Step 4: Simplify right side
   465,543x = 475,522,645,142.25
5. Step 5: Solve for x
   x = 475,522,645,142.25/465,543
6. Step 6: Final answer
   x = 1,021,436.57