Finding the Fourth Proportional to 23,161.96, 31,934.82 and 15,697

Step by Step Solution

1. Step 1: Write the proportion equation
   23,161.96 : 31,934.82 = 15,697 : x
2. Step 2: Convert to fraction form
   23,161.96/31,934.82 = 15,697/x
3. Step 3: Cross multiply
   23,161.96x = 31,934.82 × 15,697
4. Step 4: Simplify right side
   23,161.96x = 501,280,869.54
5. Step 5: Solve for x
   x = 501,280,869.54/23,161.96
6. Step 6: Final answer
   x = 21,642.42