Finding the Fourth Proportional to 16,978.31, 23,429.63 and 9,424.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.31 : 23,429.63 = 9,424.42 : x
2. Step 2: Convert to fraction form
   16,978.31/23,429.63 = 9,424.42/x
3. Step 3: Cross multiply
   16,978.31x = 23,429.63 × 9,424.42
4. Step 4: Simplify right side
   16,978.31x = 220,810,673.56
5. Step 5: Solve for x
   x = 220,810,673.56/16,978.31
6. Step 6: Final answer
   x = 13,005.46