Finding the Fourth Proportional to 5,439.42, 7,504.74 and 3,081.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,439.42 : 7,504.74 = 3,081.12 : x
2. Step 2: Convert to fraction form
   5,439.42/7,504.74 = 3,081.12/x
3. Step 3: Cross multiply
   5,439.42x = 7,504.74 × 3,081.12
4. Step 4: Simplify right side
   5,439.42x = 23,123,004.51
5. Step 5: Solve for x
   x = 23,123,004.51/5,439.42
6. Step 6: Final answer
   x = 4,251.01