Finding the Third Proportional to 172,020 and 262,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,020 : 262,540.50 = 262,540.50 : x
2. Step 2: Convert to fraction form
   172,020/262,540.50 = 262,540.50/x
3. Step 3: Cross multiply
   172,020x = 262,540.50 × 262,540.50
4. Step 4: Simplify right side
   172,020x = 68,927,514,140.25
5. Step 5: Solve for x
   x = 68,927,514,140.25/172,020
6. Step 6: Final answer
   x = 400,694.77