Finding the Third Proportional to 154,940 and 328,480.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,940 : 328,480.50 = 328,480.50 : x
2. Step 2: Convert to fraction form
   154,940/328,480.50 = 328,480.50/x
3. Step 3: Cross multiply
   154,940x = 328,480.50 × 328,480.50
4. Step 4: Simplify right side
   154,940x = 107,899,438,880.25
5. Step 5: Solve for x
   x = 107,899,438,880.25/154,940
6. Step 6: Final answer
   x = 696,394.98