Finding the Third Proportional to 150,688.50 and 331,507.50

Step by Step Solution

1. Step 1: Write the proportion equation
   150,688.50 : 331,507.50 = 331,507.50 : x
2. Step 2: Convert to fraction form
   150,688.50/331,507.50 = 331,507.50/x
3. Step 3: Cross multiply
   150,688.50x = 331,507.50 × 331,507.50
4. Step 4: Simplify right side
   150,688.50x = 109,897,222,556.25
5. Step 5: Solve for x
   x = 109,897,222,556.25/150,688.50
6. Step 6: Final answer
   x = 729,300.66