Finding the Fourth Proportional to 16,978.17, 23,427.37 and 9,424.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.17 : 23,427.37 = 9,424.55 : x
2. Step 2: Convert to fraction form
   16,978.17/23,427.37 = 9,424.55/x
3. Step 3: Cross multiply
   16,978.17x = 23,427.37 × 9,424.55
4. Step 4: Simplify right side
   16,978.17x = 220,792,255.67
5. Step 5: Solve for x
   x = 220,792,255.67/16,978.17
6. Step 6: Final answer
   x = 13,004.48