Finding the Fourth Proportional to 31,019.12, 42,806 and 16,871.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.12 : 42,806 = 16,871.98 : x
2. Step 2: Convert to fraction form
   31,019.12/42,806 = 16,871.98/x
3. Step 3: Cross multiply
   31,019.12x = 42,806 × 16,871.98
4. Step 4: Simplify right side
   31,019.12x = 722,221,975.88
5. Step 5: Solve for x
   x = 722,221,975.88/31,019.12
6. Step 6: Final answer
   x = 23,283.12