Finding the Fourth Proportional to 394,676.82, 544,645.89 and 215,828.82

Step by Step Solution

1. Step 1: Write the proportion equation
   394,676.82 : 544,645.89 = 215,828.82 : x
2. Step 2: Convert to fraction form
   394,676.82/544,645.89 = 215,828.82/x
3. Step 3: Cross multiply
   394,676.82x = 544,645.89 × 215,828.82
4. Step 4: Simplify right side
   394,676.82x = 117,550,279,756.55
5. Step 5: Solve for x
   x = 117,550,279,756.55/394,676.82
6. Step 6: Final answer
   x = 297,839.33