Finding the Fourth Proportional to 13,090.69, 18,069.12 and 8,901.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,090.69 : 18,069.12 = 8,901.37 : x
2. Step 2: Convert to fraction form
   13,090.69/18,069.12 = 8,901.37/x
3. Step 3: Cross multiply
   13,090.69x = 18,069.12 × 8,901.37
4. Step 4: Simplify right side
   13,090.69x = 160,839,922.69
5. Step 5: Solve for x
   x = 160,839,922.69/13,090.69
6. Step 6: Final answer
   x = 12,286.59