Finding the Fourth Proportional to 422,046.72, 582,426.18 and 231,077.88

Step by Step Solution

1. Step 1: Write the proportion equation
   422,046.72 : 582,426.18 = 231,077.88 : x
2. Step 2: Convert to fraction form
   422,046.72/582,426.18 = 231,077.88/x
3. Step 3: Cross multiply
   422,046.72x = 582,426.18 × 231,077.88
4. Step 4: Simplify right side
   422,046.72x = 134,585,806,930.90
5. Step 5: Solve for x
   x = 134,585,806,930.90/422,046.72
6. Step 6: Final answer
   x = 318,888.41