Finding the Fourth Proportional to 13,105.72, 19,656.66 and 3,872.44

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.72 : 19,656.66 = 3,872.44 : x
2. Step 2: Convert to fraction form
   13,105.72/19,656.66 = 3,872.44/x
3. Step 3: Cross multiply
   13,105.72x = 19,656.66 × 3,872.44
4. Step 4: Simplify right side
   13,105.72x = 76,119,236.45
5. Step 5: Solve for x
   x = 76,119,236.45/13,105.72
6. Step 6: Final answer
   x = 5,808.09