Finding the Fourth Proportional to 16,970.34, 23,419.20 and 9,417.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,970.34 : 23,419.20 = 9,417.18 : x
2. Step 2: Convert to fraction form
   16,970.34/23,419.20 = 9,417.18/x
3. Step 3: Cross multiply
   16,970.34x = 23,419.20 × 9,417.18
4. Step 4: Simplify right side
   16,970.34x = 220,542,821.86
5. Step 5: Solve for x
   x = 220,542,821.86/16,970.34
6. Step 6: Final answer
   x = 12,995.78