Finding the Fourth Proportional to 1,559.34, 2,151.82 and 851.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.34 : 2,151.82 = 851.18 : x
2. Step 2: Convert to fraction form
   1,559.34/2,151.82 = 851.18/x
3. Step 3: Cross multiply
   1,559.34x = 2,151.82 × 851.18
4. Step 4: Simplify right side
   1,559.34x = 1,831,586.15
5. Step 5: Solve for x
   x = 1,831,586.15/1,559.34
6. Step 6: Final answer
   x = 1,174.59