Finding the Third Proportional to 311,442.50 and 408,950

Step by Step Solution

1. Step 1: Write the proportion equation
   311,442.50 : 408,950 = 408,950 : x
2. Step 2: Convert to fraction form
   311,442.50/408,950 = 408,950/x
3. Step 3: Cross multiply
   311,442.50x = 408,950 × 408,950
4. Step 4: Simplify right side
   311,442.50x = 167,240,102,500
5. Step 5: Solve for x
   x = 167,240,102,500/311,442.50
6. Step 6: Final answer
   x = 536,985.49