Finding the Fourth Proportional to 12,171.82, 18,249.99 and 5,148.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,171.82 : 18,249.99 = 5,148.16 : x
2. Step 2: Convert to fraction form
   12,171.82/18,249.99 = 5,148.16/x
3. Step 3: Cross multiply
   12,171.82x = 18,249.99 × 5,148.16
4. Step 4: Simplify right side
   12,171.82x = 93,953,868.52
5. Step 5: Solve for x
   x = 93,953,868.52/12,171.82
6. Step 6: Final answer
   x = 7,718.97