Finding the Third Proportional to 122,335.50 and 172,278

Step by Step Solution

1. Step 1: Write the proportion equation
   122,335.50 : 172,278 = 172,278 : x
2. Step 2: Convert to fraction form
   122,335.50/172,278 = 172,278/x
3. Step 3: Cross multiply
   122,335.50x = 172,278 × 172,278
4. Step 4: Simplify right side
   122,335.50x = 29,679,709,284
5. Step 5: Solve for x
   x = 29,679,709,284/122,335.50
6. Step 6: Final answer
   x = 242,609.13