Finding the Fourth Proportional to 13,181.78, 19,773.72 and 3,821.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,181.78 : 19,773.72 = 3,821.96 : x
2. Step 2: Convert to fraction form
   13,181.78/19,773.72 = 3,821.96/x
3. Step 3: Cross multiply
   13,181.78x = 19,773.72 × 3,821.96
4. Step 4: Simplify right side
   13,181.78x = 75,574,366.89
5. Step 5: Solve for x
   x = 75,574,366.89/13,181.78
6. Step 6: Final answer
   x = 5,733.24