Finding the Fourth Proportional to 16,980.69, 23,434.73 and 9,429.39

Step by Step Solution

1. Step 1: Write the proportion equation
   16,980.69 : 23,434.73 = 9,429.39 : x
2. Step 2: Convert to fraction form
   16,980.69/23,434.73 = 9,429.39/x
3. Step 3: Cross multiply
   16,980.69x = 23,434.73 × 9,429.39
4. Step 4: Simplify right side
   16,980.69x = 220,975,144.28
5. Step 5: Solve for x
   x = 220,975,144.28/16,980.69
6. Step 6: Final answer
   x = 13,013.32