Finding the Fourth Proportional to 13,615.29, 18,788.96 and 7,565.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,615.29 : 18,788.96 = 7,565.50 : x
2. Step 2: Convert to fraction form
   13,615.29/18,788.96 = 7,565.50/x
3. Step 3: Cross multiply
   13,615.29x = 18,788.96 × 7,565.50
4. Step 4: Simplify right side
   13,615.29x = 142,147,919.28
5. Step 5: Solve for x
   x = 142,147,919.28/13,615.29
6. Step 6: Final answer
   x = 10,440.32