Finding the Fourth Proportional to 5,424.05, 7,484.34 and 3,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,424.05 : 7,484.34 = 3,185.72 : x
2. Step 2: Convert to fraction form
   5,424.05/7,484.34 = 3,185.72/x
3. Step 3: Cross multiply
   5,424.05x = 7,484.34 × 3,185.72
4. Step 4: Simplify right side
   5,424.05x = 23,842,974.20
5. Step 5: Solve for x
   x = 23,842,974.20/5,424.05
6. Step 6: Final answer
   x = 4,395.79