Finding the Fourth Proportional to 1,371.56, 1,890.53 and 1,072.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.56 : 1,890.53 = 1,072.28 : x
2. Step 2: Convert to fraction form
   1,371.56/1,890.53 = 1,072.28/x
3. Step 3: Cross multiply
   1,371.56x = 1,890.53 × 1,072.28
4. Step 4: Simplify right side
   1,371.56x = 2,027,176.87
5. Step 5: Solve for x
   x = 2,027,176.87/1,371.56
6. Step 6: Final answer
   x = 1,478.01