Finding the Third Proportional to 192,123 and 308,689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   192,123 : 308,689.50 = 308,689.50 : x
2. Step 2: Convert to fraction form
   192,123/308,689.50 = 308,689.50/x
3. Step 3: Cross multiply
   192,123x = 308,689.50 × 308,689.50
4. Step 4: Simplify right side
   192,123x = 95,289,207,410.25
5. Step 5: Solve for x
   x = 95,289,207,410.25/192,123
6. Step 6: Final answer
   x = 495,980.22