Finding the Fourth Proportional to 23,162.15, 31,964.40 and 13,090.38

Step by Step Solution

1. Step 1: Write the proportion equation
   23,162.15 : 31,964.40 = 13,090.38 : x
2. Step 2: Convert to fraction form
   23,162.15/31,964.40 = 13,090.38/x
3. Step 3: Cross multiply
   23,162.15x = 31,964.40 × 13,090.38
4. Step 4: Simplify right side
   23,162.15x = 418,426,142.47
5. Step 5: Solve for x
   x = 418,426,142.47/23,162.15
6. Step 6: Final answer
   x = 18,065.09