Finding the Fourth Proportional to 10,424.78, 15,638.58 and 3,855.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,424.78 : 15,638.58 = 3,855.62 : x
2. Step 2: Convert to fraction form
   10,424.78/15,638.58 = 3,855.62/x
3. Step 3: Cross multiply
   10,424.78x = 15,638.58 × 3,855.62
4. Step 4: Simplify right side
   10,424.78x = 60,296,421.82
5. Step 5: Solve for x
   x = 60,296,421.82/10,424.78
6. Step 6: Final answer
   x = 5,783.95