Finding the Fourth Proportional to 31,013.72, 42,800.06 and 17,768.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,013.72 : 42,800.06 = 17,768.28 : x
2. Step 2: Convert to fraction form
   31,013.72/42,800.06 = 17,768.28/x
3. Step 3: Cross multiply
   31,013.72x = 42,800.06 × 17,768.28
4. Step 4: Simplify right side
   31,013.72x = 760,483,450.10
5. Step 5: Solve for x
   x = 760,483,450.10/31,013.72
6. Step 6: Final answer
   x = 24,520.87