Finding the Fourth Proportional to 13,080.89, 19,585.40 and 9,136.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.89 : 19,585.40 = 9,136.09 : x
2. Step 2: Convert to fraction form
   13,080.89/19,585.40 = 9,136.09/x
3. Step 3: Cross multiply
   13,080.89x = 19,585.40 × 9,136.09
4. Step 4: Simplify right side
   13,080.89x = 178,933,955.89
5. Step 5: Solve for x
   x = 178,933,955.89/13,080.89
6. Step 6: Final answer
   x = 13,679.03