Finding the Fourth Proportional to 20,826.09, 31,238.87 and 5,031

Step by Step Solution

1. Step 1: Write the proportion equation
   20,826.09 : 31,238.87 = 5,031 : x
2. Step 2: Convert to fraction form
   20,826.09/31,238.87 = 5,031/x
3. Step 3: Cross multiply
   20,826.09x = 31,238.87 × 5,031
4. Step 4: Simplify right side
   20,826.09x = 157,162,729.82
5. Step 5: Solve for x
   x = 157,162,729.82/20,826.09
6. Step 6: Final answer
   x = 7,546.43