Finding the Fourth Proportional to 23,065.69, 31,824.06 and 12,990.60

Step by Step Solution

1. Step 1: Write the proportion equation
   23,065.69 : 31,824.06 = 12,990.60 : x
2. Step 2: Convert to fraction form
   23,065.69/31,824.06 = 12,990.60/x
3. Step 3: Cross multiply
   23,065.69x = 31,824.06 × 12,990.60
4. Step 4: Simplify right side
   23,065.69x = 413,413,673.62
5. Step 5: Solve for x
   x = 413,413,673.62/23,065.69
6. Step 6: Final answer
   x = 17,923.32