Finding the Third Proportional to 154,617 and 209,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,617 : 209,728.50 = 209,728.50 : x
2. Step 2: Convert to fraction form
   154,617/209,728.50 = 209,728.50/x
3. Step 3: Cross multiply
   154,617x = 209,728.50 × 209,728.50
4. Step 4: Simplify right side
   154,617x = 43,986,043,712.25
5. Step 5: Solve for x
   x = 43,986,043,712.25/154,617
6. Step 6: Final answer
   x = 284,483.88