Finding the Fourth Proportional to 3,424.34, 5,109.61 and 3,215.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,424.34 : 5,109.61 = 3,215.36 : x
2. Step 2: Convert to fraction form
   3,424.34/5,109.61 = 3,215.36/x
3. Step 3: Cross multiply
   3,424.34x = 5,109.61 × 3,215.36
4. Step 4: Simplify right side
   3,424.34x = 16,429,235.61
5. Step 5: Solve for x
   x = 16,429,235.61/3,424.34
6. Step 6: Final answer
   x = 4,797.78