Finding the Fourth Proportional to 9,990.42, 13,786.19 and 5,514.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.42 : 13,786.19 = 5,514.05 : x
2. Step 2: Convert to fraction form
   9,990.42/13,786.19 = 5,514.05/x
3. Step 3: Cross multiply
   9,990.42x = 13,786.19 × 5,514.05
4. Step 4: Simplify right side
   9,990.42x = 76,017,771.99
5. Step 5: Solve for x
   x = 76,017,771.99/9,990.42
6. Step 6: Final answer
   x = 7,609.07