Finding the Fourth Proportional to 31,383.37, 43,257 and 30,552.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,383.37 : 43,257 = 30,552.31 : x
2. Step 2: Convert to fraction form
   31,383.37/43,257 = 30,552.31/x
3. Step 3: Cross multiply
   31,383.37x = 43,257 × 30,552.31
4. Step 4: Simplify right side
   31,383.37x = 1,321,601,273.67
5. Step 5: Solve for x
   x = 1,321,601,273.67/31,383.37
6. Step 6: Final answer
   x = 42,111.52