Finding the Third Proportional to 70,128.75 and 150,304.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,128.75 : 150,304.50 = 150,304.50 : x
2. Step 2: Convert to fraction form
   70,128.75/150,304.50 = 150,304.50/x
3. Step 3: Cross multiply
   70,128.75x = 150,304.50 × 150,304.50
4. Step 4: Simplify right side
   70,128.75x = 22,591,442,720.25
5. Step 5: Solve for x
   x = 22,591,442,720.25/70,128.75
6. Step 6: Final answer
   x = 322,142.38