Finding the Fourth Proportional to 1,185.96, 1,785.83 and 879.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.96 : 1,785.83 = 879.98 : x
2. Step 2: Convert to fraction form
   1,185.96/1,785.83 = 879.98/x
3. Step 3: Cross multiply
   1,185.96x = 1,785.83 × 879.98
4. Step 4: Simplify right side
   1,185.96x = 1,571,494.68
5. Step 5: Solve for x
   x = 1,571,494.68/1,185.96
6. Step 6: Final answer
   x = 1,325.08