Finding the Third Proportional to 438,229.50 and 685,023

Step by Step Solution

1. Step 1: Write the proportion equation
   438,229.50 : 685,023 = 685,023 : x
2. Step 2: Convert to fraction form
   438,229.50/685,023 = 685,023/x
3. Step 3: Cross multiply
   438,229.50x = 685,023 × 685,023
4. Step 4: Simplify right side
   438,229.50x = 469,256,510,529
5. Step 5: Solve for x
   x = 469,256,510,529/438,229.50
6. Step 6: Final answer
   x = 1,070,800.83