Finding the Fourth Proportional to 13,019.27, 19,529.91 and 3,660.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.27 : 19,529.91 = 3,660.05 : x
2. Step 2: Convert to fraction form
   13,019.27/19,529.91 = 3,660.05/x
3. Step 3: Cross multiply
   13,019.27x = 19,529.91 × 3,660.05
4. Step 4: Simplify right side
   13,019.27x = 71,480,495.92
5. Step 5: Solve for x
   x = 71,480,495.92/13,019.27
6. Step 6: Final answer
   x = 5,490.36