Finding the Fourth Proportional to 328,389.31, 492,588.83 and 216,784.27

Step by Step Solution

1. Step 1: Write the proportion equation
   328,389.31 : 492,588.83 = 216,784.27 : x
2. Step 2: Convert to fraction form
   328,389.31/492,588.83 = 216,784.27/x
3. Step 3: Cross multiply
   328,389.31x = 492,588.83 × 216,784.27
4. Step 4: Simplify right side
   328,389.31x = 106,785,509,921.70
5. Step 5: Solve for x
   x = 106,785,509,921.70/328,389.31
6. Step 6: Final answer
   x = 325,179.62