Finding the Fourth Proportional to 1,112.08, 1,665.52 and 879.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.08 : 1,665.52 = 879.41 : x
2. Step 2: Convert to fraction form
   1,112.08/1,665.52 = 879.41/x
3. Step 3: Cross multiply
   1,112.08x = 1,665.52 × 879.41
4. Step 4: Simplify right side
   1,112.08x = 1,464,674.94
5. Step 5: Solve for x
   x = 1,464,674.94/1,112.08
6. Step 6: Final answer
   x = 1,317.06