Finding the Fourth Proportional to 31,139.27, 42,971.97 and 17,710.51

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139.27 : 42,971.97 = 17,710.51 : x
2. Step 2: Convert to fraction form
   31,139.27/42,971.97 = 17,710.51/x
3. Step 3: Cross multiply
   31,139.27x = 42,971.97 × 17,710.51
4. Step 4: Simplify right side
   31,139.27x = 761,055,504.40
5. Step 5: Solve for x
   x = 761,055,504.40/31,139.27
6. Step 6: Final answer
   x = 24,440.38