Finding the Fourth Proportional to 1,048.56, 1,443.71 and 890.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.56 : 1,443.71 = 890.87 : x
2. Step 2: Convert to fraction form
   1,048.56/1,443.71 = 890.87/x
3. Step 3: Cross multiply
   1,048.56x = 1,443.71 × 890.87
4. Step 4: Simplify right side
   1,048.56x = 1,286,146.25
5. Step 5: Solve for x
   x = 1,286,146.25/1,048.56
6. Step 6: Final answer
   x = 1,226.58