Finding the Fourth Proportional to 494,429.30, 741,471.15 and 257,693.30

Step by Step Solution

1. Step 1: Write the proportion equation
   494,429.30 : 741,471.15 = 257,693.30 : x
2. Step 2: Convert to fraction form
   494,429.30/741,471.15 = 257,693.30/x
3. Step 3: Cross multiply
   494,429.30x = 741,471.15 × 257,693.30
4. Step 4: Simplify right side
   494,429.30x = 191,072,147,498.30
5. Step 5: Solve for x
   x = 191,072,147,498.30/494,429.30
6. Step 6: Final answer
   x = 386,449.89