Finding the Fourth Proportional to 12,829.27, 19,228.18 and 7,287.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,829.27 : 19,228.18 = 7,287.28 : x
2. Step 2: Convert to fraction form
   12,829.27/19,228.18 = 7,287.28/x
3. Step 3: Cross multiply
   12,829.27x = 19,228.18 × 7,287.28
4. Step 4: Simplify right side
   12,829.27x = 140,121,131.55
5. Step 5: Solve for x
   x = 140,121,131.55/12,829.27
6. Step 6: Final answer
   x = 10,921.99