Finding the Fourth Proportional to 13,410.78, 18,504.06 and 8,104.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,410.78 : 18,504.06 = 8,104.56 : x
2. Step 2: Convert to fraction form
   13,410.78/18,504.06 = 8,104.56/x
3. Step 3: Cross multiply
   13,410.78x = 18,504.06 × 8,104.56
4. Step 4: Simplify right side
   13,410.78x = 149,967,264.51
5. Step 5: Solve for x
   x = 149,967,264.51/13,410.78
6. Step 6: Final answer
   x = 11,182.59