Finding the Third Proportional to 394,911 and 612,604.50

Step by Step Solution

1. Step 1: Write the proportion equation
   394,911 : 612,604.50 = 612,604.50 : x
2. Step 2: Convert to fraction form
   394,911/612,604.50 = 612,604.50/x
3. Step 3: Cross multiply
   394,911x = 612,604.50 × 612,604.50
4. Step 4: Simplify right side
   394,911x = 375,284,273,420.25
5. Step 5: Solve for x
   x = 375,284,273,420.25/394,911
6. Step 6: Final answer
   x = 950,300.89