Finding the Fourth Proportional to 315,693.99, 435,659.22 and 172,456.38

Step by Step Solution

1. Step 1: Write the proportion equation
   315,693.99 : 435,659.22 = 172,456.38 : x
2. Step 2: Convert to fraction form
   315,693.99/435,659.22 = 172,456.38/x
3. Step 3: Cross multiply
   315,693.99x = 435,659.22 × 172,456.38
4. Step 4: Simplify right side
   315,693.99x = 75,132,211,994.82
5. Step 5: Solve for x
   x = 75,132,211,994.82/315,693.99
6. Step 6: Final answer
   x = 237,990.63