Finding the Third Proportional to 398,233.50 and 609,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,233.50 : 609,469.50 = 609,469.50 : x
2. Step 2: Convert to fraction form
   398,233.50/609,469.50 = 609,469.50/x
3. Step 3: Cross multiply
   398,233.50x = 609,469.50 × 609,469.50
4. Step 4: Simplify right side
   398,233.50x = 371,453,071,430.25
5. Step 5: Solve for x
   x = 371,453,071,430.25/398,233.50
6. Step 6: Final answer
   x = 932,751.94