Finding the Fourth Proportional to 315,086.24, 434,889.60 and 200,342.72

Step by Step Solution

1. Step 1: Write the proportion equation
   315,086.24 : 434,889.60 = 200,342.72 : x
2. Step 2: Convert to fraction form
   315,086.24/434,889.60 = 200,342.72/x
3. Step 3: Cross multiply
   315,086.24x = 434,889.60 × 200,342.72
4. Step 4: Simplify right side
   315,086.24x = 87,126,965,363.71
5. Step 5: Solve for x
   x = 87,126,965,363.71/315,086.24
6. Step 6: Final answer
   x = 276,517.84