Finding the Fourth Proportional to 13,180.57, 19,766.05 and 3,818.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,180.57 : 19,766.05 = 3,818.05 : x
2. Step 2: Convert to fraction form
   13,180.57/19,766.05 = 3,818.05/x
3. Step 3: Cross multiply
   13,180.57x = 19,766.05 × 3,818.05
4. Step 4: Simplify right side
   13,180.57x = 75,467,767.20
5. Step 5: Solve for x
   x = 75,467,767.20/13,180.57
6. Step 6: Final answer
   x = 5,725.68