Finding the Fourth Proportional to 23,789.69, 35,647.47 and 8,990.53

Step by Step Solution

1. Step 1: Write the proportion equation
   23,789.69 : 35,647.47 = 8,990.53 : x
2. Step 2: Convert to fraction form
   23,789.69/35,647.47 = 8,990.53/x
3. Step 3: Cross multiply
   23,789.69x = 35,647.47 × 8,990.53
4. Step 4: Simplify right side
   23,789.69x = 320,489,648.46
5. Step 5: Solve for x
   x = 320,489,648.46/23,789.69
6. Step 6: Final answer
   x = 13,471.79