Finding the Fourth Proportional to 3,443.40, 5,166.72 and 3,385.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.40 : 5,166.72 = 3,385.08 : x
2. Step 2: Convert to fraction form
   3,443.40/5,166.72 = 3,385.08/x
3. Step 3: Cross multiply
   3,443.40x = 5,166.72 × 3,385.08
4. Step 4: Simplify right side
   3,443.40x = 17,489,760.54
5. Step 5: Solve for x
   x = 17,489,760.54/3,443.40
6. Step 6: Final answer
   x = 5,079.21