Finding the Fourth Proportional to 2,216.57, 3,325.61 and 1,393.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.57 : 3,325.61 = 1,393.88 : x
2. Step 2: Convert to fraction form
   2,216.57/3,325.61 = 1,393.88/x
3. Step 3: Cross multiply
   2,216.57x = 3,325.61 × 1,393.88
4. Step 4: Simplify right side
   2,216.57x = 4,635,501.27
5. Step 5: Solve for x
   x = 4,635,501.27/2,216.57
6. Step 6: Final answer
   x = 2,091.29