Finding the Fourth Proportional to 12,087.21, 18,109.38 and 10,314.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.21 : 18,109.38 = 10,314.22 : x
2. Step 2: Convert to fraction form
   12,087.21/18,109.38 = 10,314.22/x
3. Step 3: Cross multiply
   12,087.21x = 18,109.38 × 10,314.22
4. Step 4: Simplify right side
   12,087.21x = 186,784,129.38
5. Step 5: Solve for x
   x = 186,784,129.38/12,087.21
6. Step 6: Final answer
   x = 15,453.04