Finding the Fourth Proportional to 31,724.27, 43,759.67 and 20,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,724.27 : 43,759.67 = 20,408.50 : x
2. Step 2: Convert to fraction form
   31,724.27/43,759.67 = 20,408.50/x
3. Step 3: Cross multiply
   31,724.27x = 43,759.67 × 20,408.50
4. Step 4: Simplify right side
   31,724.27x = 893,069,225.20
5. Step 5: Solve for x
   x = 893,069,225.20/31,724.27
6. Step 6: Final answer
   x = 28,150.98