Finding the Third Proportional to 108,129 and 172,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108,129 : 172,185.50 = 172,185.50 : x
2. Step 2: Convert to fraction form
   108,129/172,185.50 = 172,185.50/x
3. Step 3: Cross multiply
   108,129x = 172,185.50 × 172,185.50
4. Step 4: Simplify right side
   108,129x = 29,647,846,410.25
5. Step 5: Solve for x
   x = 29,647,846,410.25/108,129
6. Step 6: Final answer
   x = 274,189.59