Finding the Fourth Proportional to 12,448.91, 18,676.83 and 5,429.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.91 : 18,676.83 = 5,429.54 : x
2. Step 2: Convert to fraction form
   12,448.91/18,676.83 = 5,429.54/x
3. Step 3: Cross multiply
   12,448.91x = 18,676.83 × 5,429.54
4. Step 4: Simplify right side
   12,448.91x = 101,406,502.17
5. Step 5: Solve for x
   x = 101,406,502.17/12,448.91
6. Step 6: Final answer
   x = 8,145.82