Finding the Fourth Proportional to 2,226.63, 3,072.78 and 1,231.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,226.63 : 3,072.78 = 1,231.89 : x
2. Step 2: Convert to fraction form
   2,226.63/3,072.78 = 1,231.89/x
3. Step 3: Cross multiply
   2,226.63x = 3,072.78 × 1,231.89
4. Step 4: Simplify right side
   2,226.63x = 3,785,311.59
5. Step 5: Solve for x
   x = 3,785,311.59/2,226.63
6. Step 6: Final answer
   x = 1,700.02