Finding the Third Proportional to 72,811.50 and 154,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,811.50 : 154,300.50 = 154,300.50 : x
2. Step 2: Convert to fraction form
   72,811.50/154,300.50 = 154,300.50/x
3. Step 3: Cross multiply
   72,811.50x = 154,300.50 × 154,300.50
4. Step 4: Simplify right side
   72,811.50x = 23,808,644,300.25
5. Step 5: Solve for x
   x = 23,808,644,300.25/72,811.50
6. Step 6: Final answer
   x = 326,990.16