Finding the Fourth Proportional to 9,443.10, 13,031.26 and 5,136.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,443.10 : 13,031.26 = 5,136.09 : x
2. Step 2: Convert to fraction form
   9,443.10/13,031.26 = 5,136.09/x
3. Step 3: Cross multiply
   9,443.10x = 13,031.26 × 5,136.09
4. Step 4: Simplify right side
   9,443.10x = 66,929,724.17
5. Step 5: Solve for x
   x = 66,929,724.17/9,443.10
6. Step 6: Final answer
   x = 7,087.69