Finding the Fourth Proportional to 2,216.06, 3,057.98 and 1,284.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.06 : 3,057.98 = 1,284.38 : x
2. Step 2: Convert to fraction form
   2,216.06/3,057.98 = 1,284.38/x
3. Step 3: Cross multiply
   2,216.06x = 3,057.98 × 1,284.38
4. Step 4: Simplify right side
   2,216.06x = 3,927,608.35
5. Step 5: Solve for x
   x = 3,927,608.35/2,216.06
6. Step 6: Final answer
   x = 1,772.34