Finding the Fourth Proportional to 5,431.89, 7,496.42 and 3,074.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,431.89 : 7,496.42 = 3,074.39 : x
2. Step 2: Convert to fraction form
   5,431.89/7,496.42 = 3,074.39/x
3. Step 3: Cross multiply
   5,431.89x = 7,496.42 × 3,074.39
4. Step 4: Simplify right side
   5,431.89x = 23,046,865.83
5. Step 5: Solve for x
   x = 23,046,865.83/5,431.89
6. Step 6: Final answer
   x = 4,242.88