Finding the Fourth Proportional to 1,559.59, 2,152.17 and 851.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.59 : 2,152.17 = 851.42 : x
2. Step 2: Convert to fraction form
   1,559.59/2,152.17 = 851.42/x
3. Step 3: Cross multiply
   1,559.59x = 2,152.17 × 851.42
4. Step 4: Simplify right side
   1,559.59x = 1,832,405.96
5. Step 5: Solve for x
   x = 1,832,405.96/1,559.59
6. Step 6: Final answer
   x = 1,174.93