Finding the Fourth Proportional to 11,215.15, 15,482.42 and 8,704.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,215.15 : 15,482.42 = 8,704.69 : x
2. Step 2: Convert to fraction form
   11,215.15/15,482.42 = 8,704.69/x
3. Step 3: Cross multiply
   11,215.15x = 15,482.42 × 8,704.69
4. Step 4: Simplify right side
   11,215.15x = 134,769,666.55
5. Step 5: Solve for x
   x = 134,769,666.55/11,215.15
6. Step 6: Final answer
   x = 12,016.75