Finding the Fourth Proportional to 394,300.19, 591,958.76 and 338,498.88

Step by Step Solution

1. Step 1: Write the proportion equation
   394,300.19 : 591,958.76 = 338,498.88 : x
2. Step 2: Convert to fraction form
   394,300.19/591,958.76 = 338,498.88/x
3. Step 3: Cross multiply
   394,300.19x = 591,958.76 × 338,498.88
4. Step 4: Simplify right side
   394,300.19x = 200,377,375,573.69
5. Step 5: Solve for x
   x = 200,377,375,573.69/394,300.19
6. Step 6: Final answer
   x = 508,184.84