Finding the Fourth Proportional to 13,608.67, 18,779.33 and 7,559.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,608.67 : 18,779.33 = 7,559.30 : x
2. Step 2: Convert to fraction form
   13,608.67/18,779.33 = 7,559.30/x
3. Step 3: Cross multiply
   13,608.67x = 18,779.33 × 7,559.30
4. Step 4: Simplify right side
   13,608.67x = 141,958,646.98
5. Step 5: Solve for x
   x = 141,958,646.98/13,608.67
6. Step 6: Final answer
   x = 10,431.48