Finding the Third Proportional to 65,218.50 and 150,390

Step by Step Solution

1. Step 1: Write the proportion equation
   65,218.50 : 150,390 = 150,390 : x
2. Step 2: Convert to fraction form
   65,218.50/150,390 = 150,390/x
3. Step 3: Cross multiply
   65,218.50x = 150,390 × 150,390
4. Step 4: Simplify right side
   65,218.50x = 22,617,152,100
5. Step 5: Solve for x
   x = 22,617,152,100/65,218.50
6. Step 6: Final answer
   x = 346,790.44