Finding the Fourth Proportional to 2,308.72, 3,458.17 and 2,143.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.72 : 3,458.17 = 2,143.48 : x
2. Step 2: Convert to fraction form
   2,308.72/3,458.17 = 2,143.48/x
3. Step 3: Cross multiply
   2,308.72x = 3,458.17 × 2,143.48
4. Step 4: Simplify right side
   2,308.72x = 7,412,518.23
5. Step 5: Solve for x
   x = 7,412,518.23/2,308.72
6. Step 6: Final answer
   x = 3,210.66