Finding the Fourth Proportional to 8,869.44, 12,238.56 and 5,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,869.44 : 12,238.56 = 5,142.72 : x
2. Step 2: Convert to fraction form
   8,869.44/12,238.56 = 5,142.72/x
3. Step 3: Cross multiply
   8,869.44x = 12,238.56 × 5,142.72
4. Step 4: Simplify right side
   8,869.44x = 62,939,487.28
5. Step 5: Solve for x
   x = 62,939,487.28/8,869.44
6. Step 6: Final answer
   x = 7,096.22