Finding the Fourth Proportional to 1,558.89, 2,151.29 and 860.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.89 : 2,151.29 = 860.27 : x
2. Step 2: Convert to fraction form
   1,558.89/2,151.29 = 860.27/x
3. Step 3: Cross multiply
   1,558.89x = 2,151.29 × 860.27
4. Step 4: Simplify right side
   1,558.89x = 1,850,675.19
5. Step 5: Solve for x
   x = 1,850,675.19/1,558.89
6. Step 6: Final answer
   x = 1,187.17