Finding the Fourth Proportional to 2,226.27, 3,072.28 and 1,387.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,226.27 : 3,072.28 = 1,387.31 : x
2. Step 2: Convert to fraction form
   2,226.27/3,072.28 = 1,387.31/x
3. Step 3: Cross multiply
   2,226.27x = 3,072.28 × 1,387.31
4. Step 4: Simplify right side
   2,226.27x = 4,262,215.92
5. Step 5: Solve for x
   x = 4,262,215.92/2,226.27
6. Step 6: Final answer
   x = 1,914.51