Finding the Fourth Proportional to 23,091.28, 31,865.86 and 13,019.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,091.28 : 31,865.86 = 13,019.28 : x
2. Step 2: Convert to fraction form
   23,091.28/31,865.86 = 13,019.28/x
3. Step 3: Cross multiply
   23,091.28x = 31,865.86 × 13,019.28
4. Step 4: Simplify right side
   23,091.28x = 414,870,553.78
5. Step 5: Solve for x
   x = 414,870,553.78/23,091.28
6. Step 6: Final answer
   x = 17,966.55