Finding the Third Proportional to 144,808.50 and 221,521.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,808.50 : 221,521.50 = 221,521.50 : x
2. Step 2: Convert to fraction form
   144,808.50/221,521.50 = 221,521.50/x
3. Step 3: Cross multiply
   144,808.50x = 221,521.50 × 221,521.50
4. Step 4: Simplify right side
   144,808.50x = 49,071,774,962.25
5. Step 5: Solve for x
   x = 49,071,774,962.25/144,808.50
6. Step 6: Final answer
   x = 338,873.58