Finding the Third Proportional to 394,230 and 617,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,230 : 617,719.50 = 617,719.50 : x
2. Step 2: Convert to fraction form
   394,230/617,719.50 = 617,719.50/x
3. Step 3: Cross multiply
   394,230x = 617,719.50 × 617,719.50
4. Step 4: Simplify right side
   394,230x = 381,577,380,680.25
5. Step 5: Solve for x
   x = 381,577,380,680.25/394,230
6. Step 6: Final answer
   x = 967,905.49