Finding the Fourth Proportional to 31,018.86, 42,806.14 and 16,871.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.86 : 42,806.14 = 16,871.72 : x
2. Step 2: Convert to fraction form
   31,018.86/42,806.14 = 16,871.72/x
3. Step 3: Cross multiply
   31,018.86x = 42,806.14 × 16,871.72
4. Step 4: Simplify right side
   31,018.86x = 722,213,208.36
5. Step 5: Solve for x
   x = 722,213,208.36/31,018.86
6. Step 6: Final answer
   x = 23,283.04