Finding the Fourth Proportional to 2,215.29, 3,056.61 and 1,283.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.29 : 3,056.61 = 1,283.25 : x
2. Step 2: Convert to fraction form
   2,215.29/3,056.61 = 1,283.25/x
3. Step 3: Cross multiply
   2,215.29x = 3,056.61 × 1,283.25
4. Step 4: Simplify right side
   2,215.29x = 3,922,394.78
5. Step 5: Solve for x
   x = 3,922,394.78/2,215.29
6. Step 6: Final answer
   x = 1,770.60