Finding the Fourth Proportional to 16,965.99, 23,412.78 and 9,412.29

Step by Step Solution

1. Step 1: Write the proportion equation
   16,965.99 : 23,412.78 = 9,412.29 : x
2. Step 2: Convert to fraction form
   16,965.99/23,412.78 = 9,412.29/x
3. Step 3: Cross multiply
   16,965.99x = 23,412.78 × 9,412.29
4. Step 4: Simplify right side
   16,965.99x = 220,367,875.07
5. Step 5: Solve for x
   x = 220,367,875.07/16,965.99
6. Step 6: Final answer
   x = 12,988.80