Finding the Fourth Proportional to 12,492.39, 17,249.43 and 7,719.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.39 : 17,249.43 = 7,719.27 : x
2. Step 2: Convert to fraction form
   12,492.39/17,249.43 = 7,719.27/x
3. Step 3: Cross multiply
   12,492.39x = 17,249.43 × 7,719.27
4. Step 4: Simplify right side
   12,492.39x = 133,153,007.52
5. Step 5: Solve for x
   x = 133,153,007.52/12,492.39
6. Step 6: Final answer
   x = 10,658.73