Finding the Third Proportional to 192,072 and 276,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   192,072 : 276,667.50 = 276,667.50 : x
2. Step 2: Convert to fraction form
   192,072/276,667.50 = 276,667.50/x
3. Step 3: Cross multiply
   192,072x = 276,667.50 × 276,667.50
4. Step 4: Simplify right side
   192,072x = 76,544,905,556.25
5. Step 5: Solve for x
   x = 76,544,905,556.25/192,072
6. Step 6: Final answer
   x = 398,521.94