Finding the Fourth Proportional to 361,196.14, 498,454.41 and 217,928.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,196.14 : 498,454.41 = 217,928.50 : x
2. Step 2: Convert to fraction form
   361,196.14/498,454.41 = 217,928.50/x
3. Step 3: Cross multiply
   361,196.14x = 498,454.41 × 217,928.50
4. Step 4: Simplify right side
   361,196.14x = 108,627,421,889.69
5. Step 5: Solve for x
   x = 108,627,421,889.69/361,196.14
6. Step 6: Final answer
   x = 300,743.58