Finding the Third Proportional to 118,315.50 and 172,072.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,315.50 : 172,072.50 = 172,072.50 : x
2. Step 2: Convert to fraction form
   118,315.50/172,072.50 = 172,072.50/x
3. Step 3: Cross multiply
   118,315.50x = 172,072.50 × 172,072.50
4. Step 4: Simplify right side
   118,315.50x = 29,608,945,256.25
5. Step 5: Solve for x
   x = 29,608,945,256.25/118,315.50
6. Step 6: Final answer
   x = 250,254.15