Finding the Fourth Proportional to 16,974.36, 23,423.63 and 9,420.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,974.36 : 23,423.63 = 9,420.15 : x
2. Step 2: Convert to fraction form
   16,974.36/23,423.63 = 9,420.15/x
3. Step 3: Cross multiply
   16,974.36x = 23,423.63 × 9,420.15
4. Step 4: Simplify right side
   16,974.36x = 220,654,061.04
5. Step 5: Solve for x
   x = 220,654,061.04/16,974.36
6. Step 6: Final answer
   x = 12,999.26