Finding the Fourth Proportional to 1,558.56, 2,150.88 and 859.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.56 : 2,150.88 = 859.92 : x
2. Step 2: Convert to fraction form
   1,558.56/2,150.88 = 859.92/x
3. Step 3: Cross multiply
   1,558.56x = 2,150.88 × 859.92
4. Step 4: Simplify right side
   1,558.56x = 1,849,584.73
5. Step 5: Solve for x
   x = 1,849,584.73/1,558.56
6. Step 6: Final answer
   x = 1,186.73