Finding the Fourth Proportional to 8,131.53, 12,190.80 and 3,200.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.53 : 12,190.80 = 3,200.25 : x
2. Step 2: Convert to fraction form
   8,131.53/12,190.80 = 3,200.25/x
3. Step 3: Cross multiply
   8,131.53x = 12,190.80 × 3,200.25
4. Step 4: Simplify right side
   8,131.53x = 39,013,607.70
5. Step 5: Solve for x
   x = 39,013,607.70/8,131.53
6. Step 6: Final answer
   x = 4,797.82