Finding the Fourth Proportional to 31,147, 42,982.90 and 19,969

Step by Step Solution

1. Step 1: Write the proportion equation
   31,147 : 42,982.90 = 19,969 : x
2. Step 2: Convert to fraction form
   31,147/42,982.90 = 19,969/x
3. Step 3: Cross multiply
   31,147x = 42,982.90 × 19,969
4. Step 4: Simplify right side
   31,147x = 858,325,530.10
5. Step 5: Solve for x
   x = 858,325,530.10/31,147
6. Step 6: Final answer
   x = 27,557.25