Finding the Third Proportional to 172,170 and 230,917.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,170 : 230,917.50 = 230,917.50 : x
2. Step 2: Convert to fraction form
   172,170/230,917.50 = 230,917.50/x
3. Step 3: Cross multiply
   172,170x = 230,917.50 × 230,917.50
4. Step 4: Simplify right side
   172,170x = 53,322,891,806.25
5. Step 5: Solve for x
   x = 53,322,891,806.25/172,170
6. Step 6: Final answer
   x = 309,710.70