Finding the Third Proportional to 290,745 and 616,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,745 : 616,018.50 = 616,018.50 : x
2. Step 2: Convert to fraction form
   290,745/616,018.50 = 616,018.50/x
3. Step 3: Cross multiply
   290,745x = 616,018.50 × 616,018.50
4. Step 4: Simplify right side
   290,745x = 379,478,792,342.25
5. Step 5: Solve for x
   x = 379,478,792,342.25/290,745
6. Step 6: Final answer
   x = 1,305,194.56