Finding the Fourth Proportional to 31,384.37, 43,258.38 and 30,553.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,384.37 : 43,258.38 = 30,553.31 : x
2. Step 2: Convert to fraction form
   31,384.37/43,258.38 = 30,553.31/x
3. Step 3: Cross multiply
   31,384.37x = 43,258.38 × 30,553.31
4. Step 4: Simplify right side
   31,384.37x = 1,321,686,694.24
5. Step 5: Solve for x
   x = 1,321,686,694.24/31,384.37
6. Step 6: Final answer
   x = 42,112.90