Finding the Fourth Proportional to 1,004.86, 1,383.63 and 879.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.86 : 1,383.63 = 879.82 : x
2. Step 2: Convert to fraction form
   1,004.86/1,383.63 = 879.82/x
3. Step 3: Cross multiply
   1,004.86x = 1,383.63 × 879.82
4. Step 4: Simplify right side
   1,004.86x = 1,217,345.35
5. Step 5: Solve for x
   x = 1,217,345.35/1,004.86
6. Step 6: Final answer
   x = 1,211.46