Finding the Fourth Proportional to 2,273.25, 3,137.22 and 1,389.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,273.25 : 3,137.22 = 1,389.27 : x
2. Step 2: Convert to fraction form
   2,273.25/3,137.22 = 1,389.27/x
3. Step 3: Cross multiply
   2,273.25x = 3,137.22 × 1,389.27
4. Step 4: Simplify right side
   2,273.25x = 4,358,445.63
5. Step 5: Solve for x
   x = 4,358,445.63/2,273.25
6. Step 6: Final answer
   x = 1,917.28