Finding the Third Proportional to 115,621.50 and 172,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   115,621.50 : 172,648.50 = 172,648.50 : x
2. Step 2: Convert to fraction form
   115,621.50/172,648.50 = 172,648.50/x
3. Step 3: Cross multiply
   115,621.50x = 172,648.50 × 172,648.50
4. Step 4: Simplify right side
   115,621.50x = 29,807,504,552.25
5. Step 5: Solve for x
   x = 29,807,504,552.25/115,621.50
6. Step 6: Final answer
   x = 257,802.44