Finding the Fourth Proportional to 23,090.82, 31,864.96 and 13,019.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,090.82 : 31,864.96 = 13,019.28 : x
2. Step 2: Convert to fraction form
   23,090.82/31,864.96 = 13,019.28/x
3. Step 3: Cross multiply
   23,090.82x = 31,864.96 × 13,019.28
4. Step 4: Simplify right side
   23,090.82x = 414,858,612.01
5. Step 5: Solve for x
   x = 414,858,612.01/23,090.82
6. Step 6: Final answer
   x = 17,966.39