Finding the Fourth Proportional to 1,363.50, 1,879.48 and 890.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.50 : 1,879.48 = 890.56 : x
2. Step 2: Convert to fraction form
   1,363.50/1,879.48 = 890.56/x
3. Step 3: Cross multiply
   1,363.50x = 1,879.48 × 890.56
4. Step 4: Simplify right side
   1,363.50x = 1,673,789.71
5. Step 5: Solve for x
   x = 1,673,789.71/1,363.50
6. Step 6: Final answer
   x = 1,227.57