Finding the Fourth Proportional to 23,119.91, 31,905.59 and 13,048.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,119.91 : 31,905.59 = 13,048.78 : x
2. Step 2: Convert to fraction form
   23,119.91/31,905.59 = 13,048.78/x
3. Step 3: Cross multiply
   23,119.91x = 31,905.59 × 13,048.78
4. Step 4: Simplify right side
   23,119.91x = 416,328,912.29
5. Step 5: Solve for x
   x = 416,328,912.29/23,119.91
6. Step 6: Final answer
   x = 18,007.37