Finding the Fourth Proportional to 31,019.14, 42,807.45 and 16,872.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.14 : 42,807.45 = 16,872.49 : x
2. Step 2: Convert to fraction form
   31,019.14/42,807.45 = 16,872.49/x
3. Step 3: Cross multiply
   31,019.14x = 42,807.45 × 16,872.49
4. Step 4: Simplify right side
   31,019.14x = 722,268,272.05
5. Step 5: Solve for x
   x = 722,268,272.05/31,019.14
6. Step 6: Final answer
   x = 23,284.60