Finding the Fourth Proportional to 9,990.17, 13,786.30 and 5,514.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.17 : 13,786.30 = 5,514.01 : x
2. Step 2: Convert to fraction form
   9,990.17/13,786.30 = 5,514.01/x
3. Step 3: Cross multiply
   9,990.17x = 13,786.30 × 5,514.01
4. Step 4: Simplify right side
   9,990.17x = 76,017,699.56
5. Step 5: Solve for x
   x = 76,017,699.56/9,990.17
6. Step 6: Final answer
   x = 7,609.25