Finding the Fourth Proportional to 31,018.69, 42,806.00 and 16,871.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.69 : 42,806.00 = 16,871.63 : x
2. Step 2: Convert to fraction form
   31,018.69/42,806.00 = 16,871.63/x
3. Step 3: Cross multiply
   31,018.69x = 42,806.00 × 16,871.63
4. Step 4: Simplify right side
   31,018.69x = 722,207,016.44
5. Step 5: Solve for x
   x = 722,207,016.44/31,018.69
6. Step 6: Final answer
   x = 23,282.97