Finding the Fourth Proportional to 31,791.99, 43,870.90 and 19,854.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,791.99 : 43,870.90 = 19,854.62 : x
2. Step 2: Convert to fraction form
   31,791.99/43,870.90 = 19,854.62/x
3. Step 3: Cross multiply
   31,791.99x = 43,870.90 × 19,854.62
4. Step 4: Simplify right side
   31,791.99x = 871,040,048.56
5. Step 5: Solve for x
   x = 871,040,048.56/31,791.99
6. Step 6: Final answer
   x = 27,398.10