Finding the Fourth Proportional to 31,059.24, 42,852.42 and 28,065.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,059.24 : 42,852.42 = 28,065.48 : x
2. Step 2: Convert to fraction form
   31,059.24/42,852.42 = 28,065.48/x
3. Step 3: Cross multiply
   31,059.24x = 42,852.42 × 28,065.48
4. Step 4: Simplify right side
   31,059.24x = 1,202,673,736.46
5. Step 5: Solve for x
   x = 1,202,673,736.46/31,059.24
6. Step 6: Final answer
   x = 38,721.93