Finding the Third Proportional to 389,703 and 584,608.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,703 : 584,608.50 = 584,608.50 : x
2. Step 2: Convert to fraction form
   389,703/584,608.50 = 584,608.50/x
3. Step 3: Cross multiply
   389,703x = 584,608.50 × 584,608.50
4. Step 4: Simplify right side
   389,703x = 341,767,098,272.25
5. Step 5: Solve for x
   x = 341,767,098,272.25/389,703
6. Step 6: Final answer
   x = 876,993.76