Finding the Fourth Proportional to 1,558.86, 2,151.04 and 860.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.86 : 2,151.04 = 860.19 : x
2. Step 2: Convert to fraction form
   1,558.86/2,151.04 = 860.19/x
3. Step 3: Cross multiply
   1,558.86x = 2,151.04 × 860.19
4. Step 4: Simplify right side
   1,558.86x = 1,850,303.10
5. Step 5: Solve for x
   x = 1,850,303.10/1,558.86
6. Step 6: Final answer
   x = 1,186.96