Finding the Third Proportional to 155,159.50 and 221,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,159.50 : 221,469.50 = 221,469.50 : x
2. Step 2: Convert to fraction form
   155,159.50/221,469.50 = 221,469.50/x
3. Step 3: Cross multiply
   155,159.50x = 221,469.50 × 221,469.50
4. Step 4: Simplify right side
   155,159.50x = 49,048,739,430.25
5. Step 5: Solve for x
   x = 49,048,739,430.25/155,159.50
6. Step 6: Final answer
   x = 316,118.18