Finding the Fourth Proportional to 11,379.60, 17,074.56 and 5,136.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,379.60 : 17,074.56 = 5,136.24 : x
2. Step 2: Convert to fraction form
   11,379.60/17,074.56 = 5,136.24/x
3. Step 3: Cross multiply
   11,379.60x = 17,074.56 × 5,136.24
4. Step 4: Simplify right side
   11,379.60x = 87,699,038.05
5. Step 5: Solve for x
   x = 87,699,038.05/11,379.60
6. Step 6: Final answer
   x = 7,706.69