Finding the Third Proportional to 398,362.50 and 609,660

Step by Step Solution

1. Step 1: Write the proportion equation
   398,362.50 : 609,660 = 609,660 : x
2. Step 2: Convert to fraction form
   398,362.50/609,660 = 609,660/x
3. Step 3: Cross multiply
   398,362.50x = 609,660 × 609,660
4. Step 4: Simplify right side
   398,362.50x = 371,685,315,600
5. Step 5: Solve for x
   x = 371,685,315,600/398,362.50
6. Step 6: Final answer
   x = 933,032.89