Finding the Fourth Proportional to 12,581.10, 18,872.60 and 3,816.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,581.10 : 18,872.60 = 3,816.72 : x
2. Step 2: Convert to fraction form
   12,581.10/18,872.60 = 3,816.72/x
3. Step 3: Cross multiply
   12,581.10x = 18,872.60 × 3,816.72
4. Step 4: Simplify right side
   12,581.10x = 72,031,410.79
5. Step 5: Solve for x
   x = 72,031,410.79/12,581.10
6. Step 6: Final answer
   x = 5,725.37