Finding the Fourth Proportional to 31,018.47, 42,805.63 and 16,871.41

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.47 : 42,805.63 = 16,871.41 : x
2. Step 2: Convert to fraction form
   31,018.47/42,805.63 = 16,871.41/x
3. Step 3: Cross multiply
   31,018.47x = 42,805.63 × 16,871.41
4. Step 4: Simplify right side
   31,018.47x = 722,191,334.04
5. Step 5: Solve for x
   x = 722,191,334.04/31,018.47
6. Step 6: Final answer
   x = 23,282.62