Finding the Fourth Proportional to 3,672.72, 5,067.85 and 2,160.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,672.72 : 5,067.85 = 2,160.35 : x
2. Step 2: Convert to fraction form
   3,672.72/5,067.85 = 2,160.35/x
3. Step 3: Cross multiply
   3,672.72x = 5,067.85 × 2,160.35
4. Step 4: Simplify right side
   3,672.72x = 10,948,339.72
5. Step 5: Solve for x
   x = 10,948,339.72/3,672.72
6. Step 6: Final answer
   x = 2,980.99