Finding the Fourth Proportional to 16,957.21, 23,402.15 and 9,404.26

Step by Step Solution

1. Step 1: Write the proportion equation
   16,957.21 : 23,402.15 = 9,404.26 : x
2. Step 2: Convert to fraction form
   16,957.21/23,402.15 = 9,404.26/x
3. Step 3: Cross multiply
   16,957.21x = 23,402.15 × 9,404.26
4. Step 4: Simplify right side
   16,957.21x = 220,079,938.15
5. Step 5: Solve for x
   x = 220,079,938.15/16,957.21
6. Step 6: Final answer
   x = 12,978.55