Finding the Fourth Proportional to 394,738.02, 544,738.05 and 213,449.49

Step by Step Solution

1. Step 1: Write the proportion equation
   394,738.02 : 544,738.05 = 213,449.49 : x
2. Step 2: Convert to fraction form
   394,738.02/544,738.05 = 213,449.49/x
3. Step 3: Cross multiply
   394,738.02x = 544,738.05 × 213,449.49
4. Step 4: Simplify right side
   394,738.02x = 116,274,058,956.10
5. Step 5: Solve for x
   x = 116,274,058,956.10/394,738.02
6. Step 6: Final answer
   x = 294,560.07