Finding the Fourth Proportional to 3,971.78, 5,507.25 and 3,840.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971.78 : 5,507.25 = 3,840.06 : x
2. Step 2: Convert to fraction form
   3,971.78/5,507.25 = 3,840.06/x
3. Step 3: Cross multiply
   3,971.78x = 5,507.25 × 3,840.06
4. Step 4: Simplify right side
   3,971.78x = 21,148,170.44
5. Step 5: Solve for x
   x = 21,148,170.44/3,971.78
6. Step 6: Final answer
   x = 5,324.61