Finding the Third Proportional to 154,839.50 and 218,040

Step by Step Solution

1. Step 1: Write the proportion equation
   154,839.50 : 218,040 = 218,040 : x
2. Step 2: Convert to fraction form
   154,839.50/218,040 = 218,040/x
3. Step 3: Cross multiply
   154,839.50x = 218,040 × 218,040
4. Step 4: Simplify right side
   154,839.50x = 47,541,441,600
5. Step 5: Solve for x
   x = 47,541,441,600/154,839.50
6. Step 6: Final answer
   x = 307,036.91