Finding the Fourth Proportional to 9,990.18, 13,786.68 and 5,514

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.18 : 13,786.68 = 5,514 : x
2. Step 2: Convert to fraction form
   9,990.18/13,786.68 = 5,514/x
3. Step 3: Cross multiply
   9,990.18x = 13,786.68 × 5,514
4. Step 4: Simplify right side
   9,990.18x = 76,019,753.52
5. Step 5: Solve for x
   x = 76,019,753.52/9,990.18
6. Step 6: Final answer
   x = 7,609.45