Finding the Fourth Proportional to 1,584.53, 2,186.60 and 885.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,584.53 : 2,186.60 = 885.89 : x
2. Step 2: Convert to fraction form
   1,584.53/2,186.60 = 885.89/x
3. Step 3: Cross multiply
   1,584.53x = 2,186.60 × 885.89
4. Step 4: Simplify right side
   1,584.53x = 1,937,082.64
5. Step 5: Solve for x
   x = 1,937,082.64/1,584.53
6. Step 6: Final answer
   x = 1,222.50