Finding the Fourth Proportional to 3,986.42, 5,507.49 and 3,045.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.42 : 5,507.49 = 3,045.50 : x
2. Step 2: Convert to fraction form
   3,986.42/5,507.49 = 3,045.50/x
3. Step 3: Cross multiply
   3,986.42x = 5,507.49 × 3,045.50
4. Step 4: Simplify right side
   3,986.42x = 16,773,065.33
5. Step 5: Solve for x
   x = 16,773,065.33/3,986.42
6. Step 6: Final answer
   x = 4,207.56