Finding the Fourth Proportional to 13,181.37, 19,771.47 and 3,821.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,181.37 : 19,771.47 = 3,821.18 : x
2. Step 2: Convert to fraction form
   13,181.37/19,771.47 = 3,821.18/x
3. Step 3: Cross multiply
   13,181.37x = 19,771.47 × 3,821.18
4. Step 4: Simplify right side
   13,181.37x = 75,550,345.73
5. Step 5: Solve for x
   x = 75,550,345.73/13,181.37
6. Step 6: Final answer
   x = 5,731.60