Finding the Fourth Proportional to 2,227.71, 3,074.58 and 1,388.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.71 : 3,074.58 = 1,388.55 : x
2. Step 2: Convert to fraction form
   2,227.71/3,074.58 = 1,388.55/x
3. Step 3: Cross multiply
   2,227.71x = 3,074.58 × 1,388.55
4. Step 4: Simplify right side
   2,227.71x = 4,269,208.06
5. Step 5: Solve for x
   x = 4,269,208.06/2,227.71
6. Step 6: Final answer
   x = 1,916.41