Finding the Third Proportional to 89,309.46 and 192,640.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,309.46 : 192,640.78 = 192,640.78 : x
2. Step 2: Convert to fraction form
   89,309.46/192,640.78 = 192,640.78/x
3. Step 3: Cross multiply
   89,309.46x = 192,640.78 × 192,640.78
4. Step 4: Simplify right side
   89,309.46x = 37,110,470,600.61
5. Step 5: Solve for x
   x = 37,110,470,600.61/89,309.46
6. Step 6: Final answer
   x = 415,526.76