Finding the Third Proportional to 153,195 and 220,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,195 : 220,648.50 = 220,648.50 : x
2. Step 2: Convert to fraction form
   153,195/220,648.50 = 220,648.50/x
3. Step 3: Cross multiply
   153,195x = 220,648.50 × 220,648.50
4. Step 4: Simplify right side
   153,195x = 48,685,760,552.25
5. Step 5: Solve for x
   x = 48,685,760,552.25/153,195
6. Step 6: Final answer
   x = 317,802.54