Finding the Fourth Proportional to 1,559.67, 2,152.42 and 861.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.67 : 2,152.42 = 861.04 : x
2. Step 2: Convert to fraction form
   1,559.67/2,152.42 = 861.04/x
3. Step 3: Cross multiply
   1,559.67x = 2,152.42 × 861.04
4. Step 4: Simplify right side
   1,559.67x = 1,853,319.72
5. Step 5: Solve for x
   x = 1,853,319.72/1,559.67
6. Step 6: Final answer
   x = 1,188.28