Finding the Fourth Proportional to 3,511.09, 5,243.50 and 3,123.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,511.09 : 5,243.50 = 3,123.59 : x
2. Step 2: Convert to fraction form
   3,511.09/5,243.50 = 3,123.59/x
3. Step 3: Cross multiply
   3,511.09x = 5,243.50 × 3,123.59
4. Step 4: Simplify right side
   3,511.09x = 16,378,521.85
5. Step 5: Solve for x
   x = 16,378,521.85/3,511.09
6. Step 6: Final answer
   x = 4,664.80