Finding the Third Proportional to 108,669 and 172,903.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108,669 : 172,903.50 = 172,903.50 : x
2. Step 2: Convert to fraction form
   108,669/172,903.50 = 172,903.50/x
3. Step 3: Cross multiply
   108,669x = 172,903.50 × 172,903.50
4. Step 4: Simplify right side
   108,669x = 29,895,620,312.25
5. Step 5: Solve for x
   x = 29,895,620,312.25/108,669
6. Step 6: Final answer
   x = 275,107.16