Finding the Fourth Proportional to 12,906.20, 19,362.52 and 3,672.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906.20 : 19,362.52 = 3,672.20 : x
2. Step 2: Convert to fraction form
   12,906.20/19,362.52 = 3,672.20/x
3. Step 3: Cross multiply
   12,906.20x = 19,362.52 × 3,672.20
4. Step 4: Simplify right side
   12,906.20x = 71,103,045.94
5. Step 5: Solve for x
   x = 71,103,045.94/12,906.20
6. Step 6: Final answer
   x = 5,509.22