Finding the Fourth Proportional to 1,550.91, 2,140.28 and 887.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.91 : 2,140.28 = 887.82 : x
2. Step 2: Convert to fraction form
   1,550.91/2,140.28 = 887.82/x
3. Step 3: Cross multiply
   1,550.91x = 2,140.28 × 887.82
4. Step 4: Simplify right side
   1,550.91x = 1,900,183.39
5. Step 5: Solve for x
   x = 1,900,183.39/1,550.91
6. Step 6: Final answer
   x = 1,225.21