Finding the Fourth Proportional to 536,978.88, 803,715.04 and 394,786.56

Step by Step Solution

1. Step 1: Write the proportion equation
   536,978.88 : 803,715.04 = 394,786.56 : x
2. Step 2: Convert to fraction form
   536,978.88/803,715.04 = 394,786.56/x
3. Step 3: Cross multiply
   536,978.88x = 803,715.04 × 394,786.56
4. Step 4: Simplify right side
   536,978.88x = 317,295,895,861.86
5. Step 5: Solve for x
   x = 317,295,895,861.86/536,978.88
6. Step 6: Final answer
   x = 590,890.83