Finding the Fourth Proportional to 13,285.53, 18,314.37 and 8,504.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,285.53 : 18,314.37 = 8,504.79 : x
2. Step 2: Convert to fraction form
   13,285.53/18,314.37 = 8,504.79/x
3. Step 3: Cross multiply
   13,285.53x = 18,314.37 × 8,504.79
4. Step 4: Simplify right side
   13,285.53x = 155,759,870.83
5. Step 5: Solve for x
   x = 155,759,870.83/13,285.53
6. Step 6: Final answer
   x = 11,724.02