Finding the Fourth Proportional to 31,018.36, 42,804.10 and 16,871.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.36 : 42,804.10 = 16,871.22 : x
2. Step 2: Convert to fraction form
   31,018.36/42,804.10 = 16,871.22/x
3. Step 3: Cross multiply
   31,018.36x = 42,804.10 × 16,871.22
4. Step 4: Simplify right side
   31,018.36x = 722,157,388.00
5. Step 5: Solve for x
   x = 722,157,388.00/31,018.36
6. Step 6: Final answer
   x = 23,281.61