Finding the Fourth Proportional to 1,585.89, 2,188.59 and 887.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,585.89 : 2,188.59 = 887.25 : x
2. Step 2: Convert to fraction form
   1,585.89/2,188.59 = 887.25/x
3. Step 3: Cross multiply
   1,585.89x = 2,188.59 × 887.25
4. Step 4: Simplify right side
   1,585.89x = 1,941,826.48
5. Step 5: Solve for x
   x = 1,941,826.48/1,585.89
6. Step 6: Final answer
   x = 1,224.44