Finding the Fourth Proportional to 2,229.87, 3,077.12 and 1,285.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,229.87 : 3,077.12 = 1,285.83 : x
2. Step 2: Convert to fraction form
   2,229.87/3,077.12 = 1,285.83/x
3. Step 3: Cross multiply
   2,229.87x = 3,077.12 × 1,285.83
4. Step 4: Simplify right side
   2,229.87x = 3,956,667.96
5. Step 5: Solve for x
   x = 3,956,667.96/2,229.87
6. Step 6: Final answer
   x = 1,774.39