Finding the Fourth Proportional to 1,585.69, 2,188.25 and 887.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,585.69 : 2,188.25 = 887.06 : x
2. Step 2: Convert to fraction form
   1,585.69/2,188.25 = 887.06/x
3. Step 3: Cross multiply
   1,585.69x = 2,188.25 × 887.06
4. Step 4: Simplify right side
   1,585.69x = 1,941,113.41
5. Step 5: Solve for x
   x = 1,941,113.41/1,585.69
6. Step 6: Final answer
   x = 1,224.15