Finding the Third Proportional to 254,407.50 and 395,616

Step by Step Solution

1. Step 1: Write the proportion equation
   254,407.50 : 395,616 = 395,616 : x
2. Step 2: Convert to fraction form
   254,407.50/395,616 = 395,616/x
3. Step 3: Cross multiply
   254,407.50x = 395,616 × 395,616
4. Step 4: Simplify right side
   254,407.50x = 156,512,019,456
5. Step 5: Solve for x
   x = 156,512,019,456/254,407.50
6. Step 6: Final answer
   x = 615,202.07