Finding the Fourth Proportional to 3,905.72, 5,872.63 and 3,601.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,905.72 : 5,872.63 = 3,601.30 : x
2. Step 2: Convert to fraction form
   3,905.72/5,872.63 = 3,601.30/x
3. Step 3: Cross multiply
   3,905.72x = 5,872.63 × 3,601.30
4. Step 4: Simplify right side
   3,905.72x = 21,149,102.42
5. Step 5: Solve for x
   x = 21,149,102.42/3,905.72
6. Step 6: Final answer
   x = 5,414.90