Finding the Fourth Proportional to 2,226.38, 3,072.43 and 1,231.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,226.38 : 3,072.43 = 1,231.69 : x
2. Step 2: Convert to fraction form
   2,226.38/3,072.43 = 1,231.69/x
3. Step 3: Cross multiply
   2,226.38x = 3,072.43 × 1,231.69
4. Step 4: Simplify right side
   2,226.38x = 3,784,275.15
5. Step 5: Solve for x
   x = 3,784,275.15/2,226.38
6. Step 6: Final answer
   x = 1,699.74