Finding the Third Proportional to 172,086.75 and 404,878.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,086.75 : 404,878.50 = 404,878.50 : x
2. Step 2: Convert to fraction form
   172,086.75/404,878.50 = 404,878.50/x
3. Step 3: Cross multiply
   172,086.75x = 404,878.50 × 404,878.50
4. Step 4: Simplify right side
   172,086.75x = 163,926,599,762.25
5. Step 5: Solve for x
   x = 163,926,599,762.25/172,086.75
6. Step 6: Final answer
   x = 952,581.18