Finding the Third Proportional to 239,385 and 354,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,385 : 354,442.50 = 354,442.50 : x
2. Step 2: Convert to fraction form
   239,385/354,442.50 = 354,442.50/x
3. Step 3: Cross multiply
   239,385x = 354,442.50 × 354,442.50
4. Step 4: Simplify right side
   239,385x = 125,629,485,806.25
5. Step 5: Solve for x
   x = 125,629,485,806.25/239,385
6. Step 6: Final answer
   x = 524,800.99