Finding the Fourth Proportional to 31,012.67, 42,797.75 and 16,865.51

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.67 : 42,797.75 = 16,865.51 : x
2. Step 2: Convert to fraction form
   31,012.67/42,797.75 = 16,865.51/x
3. Step 3: Cross multiply
   31,012.67x = 42,797.75 × 16,865.51
4. Step 4: Simplify right side
   31,012.67x = 721,805,582.29
5. Step 5: Solve for x
   x = 721,805,582.29/31,012.67
6. Step 6: Final answer
   x = 23,274.54