Finding the Fourth Proportional to 331,679.32, 457,782.78 and 231,019

Step by Step Solution

1. Step 1: Write the proportion equation
   331,679.32 : 457,782.78 = 231,019 : x
2. Step 2: Convert to fraction form
   331,679.32/457,782.78 = 231,019/x
3. Step 3: Cross multiply
   331,679.32x = 457,782.78 × 231,019
4. Step 4: Simplify right side
   331,679.32x = 105,756,520,052.82
5. Step 5: Solve for x
   x = 105,756,520,052.82/331,679.32
6. Step 6: Final answer
   x = 318,851.72