Finding the Fourth Proportional to 31,013, 42,797.73 and 16,865.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,013 : 42,797.73 = 16,865.81 : x
2. Step 2: Convert to fraction form
   31,013/42,797.73 = 16,865.81/x
3. Step 3: Cross multiply
   31,013x = 42,797.73 × 16,865.81
4. Step 4: Simplify right side
   31,013x = 721,818,382.61
5. Step 5: Solve for x
   x = 721,818,382.61/31,013
6. Step 6: Final answer
   x = 23,274.70