Finding the Third Proportional to 190,905 and 397,318.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,905 : 397,318.50 = 397,318.50 : x
2. Step 2: Convert to fraction form
   190,905/397,318.50 = 397,318.50/x
3. Step 3: Cross multiply
   190,905x = 397,318.50 × 397,318.50
4. Step 4: Simplify right side
   190,905x = 157,861,990,442.25
5. Step 5: Solve for x
   x = 157,861,990,442.25/190,905
6. Step 6: Final answer
   x = 826,913.86