Finding the Fourth Proportional to 9,990.59, 13,786.92 and 5,514.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.59 : 13,786.92 = 5,514.53 : x
2. Step 2: Convert to fraction form
   9,990.59/13,786.92 = 5,514.53/x
3. Step 3: Cross multiply
   9,990.59x = 13,786.92 × 5,514.53
4. Step 4: Simplify right side
   9,990.59x = 76,028,315.01
5. Step 5: Solve for x
   x = 76,028,315.01/9,990.59
6. Step 6: Final answer
   x = 7,610.00