Finding the Fourth Proportional to 31,019.73, 42,807.18 and 16,872.51

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.73 : 42,807.18 = 16,872.51 : x
2. Step 2: Convert to fraction form
   31,019.73/42,807.18 = 16,872.51/x
3. Step 3: Cross multiply
   31,019.73x = 42,807.18 × 16,872.51
4. Step 4: Simplify right side
   31,019.73x = 722,264,572.62
5. Step 5: Solve for x
   x = 722,264,572.62/31,019.73
6. Step 6: Final answer
   x = 23,284.04