Finding the Fourth Proportional to 13,112.69, 18,094.86 and 7,144.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,112.69 : 18,094.86 = 7,144.34 : x
2. Step 2: Convert to fraction form
   13,112.69/18,094.86 = 7,144.34/x
3. Step 3: Cross multiply
   13,112.69x = 18,094.86 × 7,144.34
4. Step 4: Simplify right side
   13,112.69x = 129,275,741.62
5. Step 5: Solve for x
   x = 129,275,741.62/13,112.69
6. Step 6: Final answer
   x = 9,858.83