Finding the Fourth Proportional to 2,227.79, 3,074.37 and 1,388.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.79 : 3,074.37 = 1,388.83 : x
2. Step 2: Convert to fraction form
   2,227.79/3,074.37 = 1,388.83/x
3. Step 3: Cross multiply
   2,227.79x = 3,074.37 × 1,388.83
4. Step 4: Simplify right side
   2,227.79x = 4,269,777.29
5. Step 5: Solve for x
   x = 4,269,777.29/2,227.79
6. Step 6: Final answer
   x = 1,916.60