Finding the Fourth Proportional to 13,885.50, 20,826.72 and 3,497.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,885.50 : 20,826.72 = 3,497.25 : x
2. Step 2: Convert to fraction form
   13,885.50/20,826.72 = 3,497.25/x
3. Step 3: Cross multiply
   13,885.50x = 20,826.72 × 3,497.25
4. Step 4: Simplify right side
   13,885.50x = 72,836,246.52
5. Step 5: Solve for x
   x = 72,836,246.52/13,885.50
6. Step 6: Final answer
   x = 5,245.49