Finding the Fourth Proportional to 5,443.31, 7,511.77 and 3,085.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,443.31 : 7,511.77 = 3,085.61 : x
2. Step 2: Convert to fraction form
   5,443.31/7,511.77 = 3,085.61/x
3. Step 3: Cross multiply
   5,443.31x = 7,511.77 × 3,085.61
4. Step 4: Simplify right side
   5,443.31x = 23,178,358.93
5. Step 5: Solve for x
   x = 23,178,358.93/5,443.31
6. Step 6: Final answer
   x = 4,258.13