Finding the Fourth Proportional to 9,986.56, 13,781.52 and 5,449.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.56 : 13,781.52 = 5,449.56 : x
2. Step 2: Convert to fraction form
   9,986.56/13,781.52 = 5,449.56/x
3. Step 3: Cross multiply
   9,986.56x = 13,781.52 × 5,449.56
4. Step 4: Simplify right side
   9,986.56x = 75,103,201.57
5. Step 5: Solve for x
   x = 75,103,201.57/9,986.56
6. Step 6: Final answer
   x = 7,520.43