Finding the Fourth Proportional to 394,113.59, 543,965.28 and 258,068.52

Step by Step Solution

1. Step 1: Write the proportion equation
   394,113.59 : 543,965.28 = 258,068.52 : x
2. Step 2: Convert to fraction form
   394,113.59/543,965.28 = 258,068.52/x
3. Step 3: Cross multiply
   394,113.59x = 543,965.28 × 258,068.52
4. Step 4: Simplify right side
   394,113.59x = 140,380,316,100.90
5. Step 5: Solve for x
   x = 140,380,316,100.90/394,113.59
6. Step 6: Final answer
   x = 356,192.53