Finding the Fourth Proportional to 2,227.14, 3,074.85 and 1,389.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.14 : 3,074.85 = 1,389.06 : x
2. Step 2: Convert to fraction form
   2,227.14/3,074.85 = 1,389.06/x
3. Step 3: Cross multiply
   2,227.14x = 3,074.85 × 1,389.06
4. Step 4: Simplify right side
   2,227.14x = 4,271,151.14
5. Step 5: Solve for x
   x = 4,271,151.14/2,227.14
6. Step 6: Final answer
   x = 1,917.77