Finding the Fourth Proportional to 31,019.69, 42,807.38 and 16,872.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.69 : 42,807.38 = 16,872.63 : x
2. Step 2: Convert to fraction form
   31,019.69/42,807.38 = 16,872.63/x
3. Step 3: Cross multiply
   31,019.69x = 42,807.38 × 16,872.63
4. Step 4: Simplify right side
   31,019.69x = 722,273,084.01
5. Step 5: Solve for x
   x = 722,273,084.01/31,019.69
6. Step 6: Final answer
   x = 23,284.34