Finding the Fourth Proportional to 12,995.51, 19,495.31 and 4,228.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,995.51 : 19,495.31 = 4,228.38 : x
2. Step 2: Convert to fraction form
   12,995.51/19,495.31 = 4,228.38/x
3. Step 3: Cross multiply
   12,995.51x = 19,495.31 × 4,228.38
4. Step 4: Simplify right side
   12,995.51x = 82,433,589.47
5. Step 5: Solve for x
   x = 82,433,589.47/12,995.51
6. Step 6: Final answer
   x = 6,343.23