Finding the Third Proportional to 357,192 and 485,104.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,192 : 485,104.50 = 485,104.50 : x
2. Step 2: Convert to fraction form
   357,192/485,104.50 = 485,104.50/x
3. Step 3: Cross multiply
   357,192x = 485,104.50 × 485,104.50
4. Step 4: Simplify right side
   357,192x = 235,326,375,920.25
5. Step 5: Solve for x
   x = 235,326,375,920.25/357,192
6. Step 6: Final answer
   x = 658,823.20