Finding the Fourth Proportional to 31,099.72, 42,918.78 and 17,673.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,099.72 : 42,918.78 = 17,673.26 : x
2. Step 2: Convert to fraction form
   31,099.72/42,918.78 = 17,673.26/x
3. Step 3: Cross multiply
   31,099.72x = 42,918.78 × 17,673.26
4. Step 4: Simplify right side
   31,099.72x = 758,514,757.82
5. Step 5: Solve for x
   x = 758,514,757.82/31,099.72
6. Step 6: Final answer
   x = 24,389.76