Finding the Fourth Proportional to 16,990.33, 23,447.25 and 9,436.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,990.33 : 23,447.25 = 9,436.78 : x
2. Step 2: Convert to fraction form
   16,990.33/23,447.25 = 9,436.78/x
3. Step 3: Cross multiply
   16,990.33x = 23,447.25 × 9,436.78
4. Step 4: Simplify right side
   16,990.33x = 221,266,539.86
5. Step 5: Solve for x
   x = 221,266,539.86/16,990.33
6. Step 6: Final answer
   x = 13,023.09