Finding the Fourth Proportional to 2,216.64, 3,058.72 and 1,284.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.64 : 3,058.72 = 1,284.96 : x
2. Step 2: Convert to fraction form
   2,216.64/3,058.72 = 1,284.96/x
3. Step 3: Cross multiply
   2,216.64x = 3,058.72 × 1,284.96
4. Step 4: Simplify right side
   2,216.64x = 3,930,332.85
5. Step 5: Solve for x
   x = 3,930,332.85/2,216.64
6. Step 6: Final answer
   x = 1,773.10