Finding the Third Proportional to 72,311 and 150,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,311 : 150,090.50 = 150,090.50 : x
2. Step 2: Convert to fraction form
   72,311/150,090.50 = 150,090.50/x
3. Step 3: Cross multiply
   72,311x = 150,090.50 × 150,090.50
4. Step 4: Simplify right side
   72,311x = 22,527,158,190.25
5. Step 5: Solve for x
   x = 22,527,158,190.25/72,311
6. Step 6: Final answer
   x = 311,531.55