Finding the Fourth Proportional to 1,586.35, 2,189.05 and 887.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,586.35 : 2,189.05 = 887.59 : x
2. Step 2: Convert to fraction form
   1,586.35/2,189.05 = 887.59/x
3. Step 3: Cross multiply
   1,586.35x = 2,189.05 × 887.59
4. Step 4: Simplify right side
   1,586.35x = 1,942,978.89
5. Step 5: Solve for x
   x = 1,942,978.89/1,586.35
6. Step 6: Final answer
   x = 1,224.81