Finding the Fourth Proportional to 1,228.87, 1,842.69 and 1,112.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.87 : 1,842.69 = 1,112.23 : x
2. Step 2: Convert to fraction form
   1,228.87/1,842.69 = 1,112.23/x
3. Step 3: Cross multiply
   1,228.87x = 1,842.69 × 1,112.23
4. Step 4: Simplify right side
   1,228.87x = 2,049,485.89
5. Step 5: Solve for x
   x = 2,049,485.89/1,228.87
6. Step 6: Final answer
   x = 1,667.79