Finding the Fourth Proportional to 31,007.72, 42,791.78 and 17,762.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.72 : 42,791.78 = 17,762.28 : x
2. Step 2: Convert to fraction form
   31,007.72/42,791.78 = 17,762.28/x
3. Step 3: Cross multiply
   31,007.72x = 42,791.78 × 17,762.28
4. Step 4: Simplify right side
   31,007.72x = 760,079,578.06
5. Step 5: Solve for x
   x = 760,079,578.06/31,007.72
6. Step 6: Final answer
   x = 24,512.59