Finding the Fourth Proportional to 4,086.72, 5,638.82 and 2,672.48

Step by Step Solution

1. Step 1: Write the proportion equation
   4,086.72 : 5,638.82 = 2,672.48 : x
2. Step 2: Convert to fraction form
   4,086.72/5,638.82 = 2,672.48/x
3. Step 3: Cross multiply
   4,086.72x = 5,638.82 × 2,672.48
4. Step 4: Simplify right side
   4,086.72x = 15,069,633.67
5. Step 5: Solve for x
   x = 15,069,633.67/4,086.72
6. Step 6: Final answer
   x = 3,687.46