Finding the Fourth Proportional to 5,439.72, 7,505.58 and 3,081.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,439.72 : 7,505.58 = 3,081.96 : x
2. Step 2: Convert to fraction form
   5,439.72/7,505.58 = 3,081.96/x
3. Step 3: Cross multiply
   5,439.72x = 7,505.58 × 3,081.96
4. Step 4: Simplify right side
   5,439.72x = 23,131,897.34
5. Step 5: Solve for x
   x = 23,131,897.34/5,439.72
6. Step 6: Final answer
   x = 4,252.41