Finding the Fourth Proportional to 422,152.37, 582,548.55 and 231,128.81

Step by Step Solution

1. Step 1: Write the proportion equation
   422,152.37 : 582,548.55 = 231,128.81 : x
2. Step 2: Convert to fraction form
   422,152.37/582,548.55 = 231,128.81/x
3. Step 3: Cross multiply
   422,152.37x = 582,548.55 × 231,128.81
4. Step 4: Simplify right side
   422,152.37x = 134,643,753,128.73
5. Step 5: Solve for x
   x = 134,643,753,128.73/422,152.37
6. Step 6: Final answer
   x = 318,945.87