Finding the Fourth Proportional to 3,900.86, 5,843.53 and 3,581.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.86 : 5,843.53 = 3,581.92 : x
2. Step 2: Convert to fraction form
   3,900.86/5,843.53 = 3,581.92/x
3. Step 3: Cross multiply
   3,900.86x = 5,843.53 × 3,581.92
4. Step 4: Simplify right side
   3,900.86x = 20,931,056.98
5. Step 5: Solve for x
   x = 20,931,056.98/3,900.86
6. Step 6: Final answer
   x = 5,365.75