Finding the Fourth Proportional to 3,985.72, 5,973.95 and 3,524.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.72 : 5,973.95 = 3,524.40 : x
2. Step 2: Convert to fraction form
   3,985.72/5,973.95 = 3,524.40/x
3. Step 3: Cross multiply
   3,985.72x = 5,973.95 × 3,524.40
4. Step 4: Simplify right side
   3,985.72x = 21,054,589.38
5. Step 5: Solve for x
   x = 21,054,589.38/3,985.72
6. Step 6: Final answer
   x = 5,282.51