Finding the Fourth Proportional to 3,895.40, 5,375.61 and 2,216.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,895.40 : 5,375.61 = 2,216.81 : x
2. Step 2: Convert to fraction form
   3,895.40/5,375.61 = 2,216.81/x
3. Step 3: Cross multiply
   3,895.40x = 5,375.61 × 2,216.81
4. Step 4: Simplify right side
   3,895.40x = 11,916,706.00
5. Step 5: Solve for x
   x = 11,916,706.00/3,895.40
6. Step 6: Final answer
   x = 3,059.17