Finding the Fourth Proportional to 16,983.96, 23,436.56 and 9,429.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,983.96 : 23,436.56 = 9,429.60 : x
2. Step 2: Convert to fraction form
   16,983.96/23,436.56 = 9,429.60/x
3. Step 3: Cross multiply
   16,983.96x = 23,436.56 × 9,429.60
4. Step 4: Simplify right side
   16,983.96x = 220,997,386.18
5. Step 5: Solve for x
   x = 220,997,386.18/16,983.96
6. Step 6: Final answer
   x = 13,012.12