Finding the Fourth Proportional to 31,368.62, 47,040.42 and 13,826

Step by Step Solution

1. Step 1: Write the proportion equation
   31,368.62 : 47,040.42 = 13,826 : x
2. Step 2: Convert to fraction form
   31,368.62/47,040.42 = 13,826/x
3. Step 3: Cross multiply
   31,368.62x = 47,040.42 × 13,826
4. Step 4: Simplify right side
   31,368.62x = 650,380,846.92
5. Step 5: Solve for x
   x = 650,380,846.92/31,368.62
6. Step 6: Final answer
   x = 20,733.49