Finding the Fourth Proportional to 3,894.99, 5,374.86 and 2,216.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,894.99 : 5,374.86 = 2,216.81 : x
2. Step 2: Convert to fraction form
   3,894.99/5,374.86 = 2,216.81/x
3. Step 3: Cross multiply
   3,894.99x = 5,374.86 × 2,216.81
4. Step 4: Simplify right side
   3,894.99x = 11,915,016.52
5. Step 5: Solve for x
   x = 11,915,016.52/3,894.99
6. Step 6: Final answer
   x = 3,059.06