Finding the Fourth Proportional to 11,104.62, 15,322.90 and 7,131.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,104.62 : 15,322.90 = 7,131.12 : x
2. Step 2: Convert to fraction form
   11,104.62/15,322.90 = 7,131.12/x
3. Step 3: Cross multiply
   11,104.62x = 15,322.90 × 7,131.12
4. Step 4: Simplify right side
   11,104.62x = 109,269,344.21
5. Step 5: Solve for x
   x = 109,269,344.21/11,104.62
6. Step 6: Final answer
   x = 9,839.99