Finding the Fourth Proportional to 3,997.32, 5,523.64 and 3,805.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.32 : 5,523.64 = 3,805.28 : x
2. Step 2: Convert to fraction form
   3,997.32/5,523.64 = 3,805.28/x
3. Step 3: Cross multiply
   3,997.32x = 5,523.64 × 3,805.28
4. Step 4: Simplify right side
   3,997.32x = 21,018,969.20
5. Step 5: Solve for x
   x = 21,018,969.20/3,997.32
6. Step 6: Final answer
   x = 5,258.27