Finding the Fourth Proportional to 427,139.16, 589,422.78 and 236,150.76

Step by Step Solution

1. Step 1: Write the proportion equation
   427,139.16 : 589,422.78 = 236,150.76 : x
2. Step 2: Convert to fraction form
   427,139.16/589,422.78 = 236,150.76/x
3. Step 3: Cross multiply
   427,139.16x = 589,422.78 × 236,150.76
4. Step 4: Simplify right side
   427,139.16x = 139,192,637,458.31
5. Step 5: Solve for x
   x = 139,192,637,458.31/427,139.16
6. Step 6: Final answer
   x = 325,871.87