Finding the Fourth Proportional to 11,123.16, 16,689.39 and 4,879.95

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.16 : 16,689.39 = 4,879.95 : x
2. Step 2: Convert to fraction form
   11,123.16/16,689.39 = 4,879.95/x
3. Step 3: Cross multiply
   11,123.16x = 16,689.39 × 4,879.95
4. Step 4: Simplify right side
   11,123.16x = 81,443,388.73
5. Step 5: Solve for x
   x = 81,443,388.73/11,123.16
6. Step 6: Final answer
   x = 7,321.97