Finding the Fourth Proportional to 12,621.50, 18,934.07 and 3,855.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.50 : 18,934.07 = 3,855.27 : x
2. Step 2: Convert to fraction form
   12,621.50/18,934.07 = 3,855.27/x
3. Step 3: Cross multiply
   12,621.50x = 18,934.07 × 3,855.27
4. Step 4: Simplify right side
   12,621.50x = 72,995,955.94
5. Step 5: Solve for x
   x = 72,995,955.94/12,621.50
6. Step 6: Final answer
   x = 5,783.46