Finding the Fourth Proportional to 3,986.42, 5,980.53 and 1,521.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.42 : 5,980.53 = 1,521.18 : x
2. Step 2: Convert to fraction form
   3,986.42/5,980.53 = 1,521.18/x
3. Step 3: Cross multiply
   3,986.42x = 5,980.53 × 1,521.18
4. Step 4: Simplify right side
   3,986.42x = 9,097,468.33
5. Step 5: Solve for x
   x = 9,097,468.33/3,986.42
6. Step 6: Final answer
   x = 2,282.12