Finding the Third Proportional to 185,439 and 397,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   185,439 : 397,120.50 = 397,120.50 : x
2. Step 2: Convert to fraction form
   185,439/397,120.50 = 397,120.50/x
3. Step 3: Cross multiply
   185,439x = 397,120.50 × 397,120.50
4. Step 4: Simplify right side
   185,439x = 157,704,691,520.25
5. Step 5: Solve for x
   x = 157,704,691,520.25/185,439
6. Step 6: Final answer
   x = 850,439.72