Finding the Fourth Proportional to 315,856.37, 435,880.83 and 172,616.42

Step by Step Solution

1. Step 1: Write the proportion equation
   315,856.37 : 435,880.83 = 172,616.42 : x
2. Step 2: Convert to fraction form
   315,856.37/435,880.83 = 172,616.42/x
3. Step 3: Cross multiply
   315,856.37x = 435,880.83 × 172,616.42
4. Step 4: Simplify right side
   315,856.37x = 75,240,187,463.67
5. Step 5: Solve for x
   x = 75,240,187,463.67/315,856.37
6. Step 6: Final answer
   x = 238,210.13