Finding the Third Proportional to 172,111.50 and 247,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,111.50 : 247,891.50 = 247,891.50 : x
2. Step 2: Convert to fraction form
   172,111.50/247,891.50 = 247,891.50/x
3. Step 3: Cross multiply
   172,111.50x = 247,891.50 × 247,891.50
4. Step 4: Simplify right side
   172,111.50x = 61,450,195,772.25
5. Step 5: Solve for x
   x = 61,450,195,772.25/172,111.50
6. Step 6: Final answer
   x = 357,037.13