Finding the Fourth Proportional to 9,328.57, 12,873.39 and 5,136.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,328.57 : 12,873.39 = 5,136.82 : x
2. Step 2: Convert to fraction form
   9,328.57/12,873.39 = 5,136.82/x
3. Step 3: Cross multiply
   9,328.57x = 12,873.39 × 5,136.82
4. Step 4: Simplify right side
   9,328.57x = 66,128,287.22
5. Step 5: Solve for x
   x = 66,128,287.22/9,328.57
6. Step 6: Final answer
   x = 7,088.79