Finding the Fourth Proportional to 5,787.72, 7,987.20 and 3,548.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,787.72 : 7,987.20 = 3,548.31 : x
2. Step 2: Convert to fraction form
   5,787.72/7,987.20 = 3,548.31/x
3. Step 3: Cross multiply
   5,787.72x = 7,987.20 × 3,548.31
4. Step 4: Simplify right side
   5,787.72x = 28,341,061.63
5. Step 5: Solve for x
   x = 28,341,061.63/5,787.72
6. Step 6: Final answer
   x = 4,896.76