Finding the Third Proportional to 172,987.69 and 243,498.38

Step by Step Solution

1. Step 1: Write the proportion equation
   172,987.69 : 243,498.38 = 243,498.38 : x
2. Step 2: Convert to fraction form
   172,987.69/243,498.38 = 243,498.38/x
3. Step 3: Cross multiply
   172,987.69x = 243,498.38 × 243,498.38
4. Step 4: Simplify right side
   172,987.69x = 59,291,458,627.64
5. Step 5: Solve for x
   x = 59,291,458,627.64/172,987.69
6. Step 6: Final answer
   x = 342,749.59