Finding the Fourth Proportional to 9,990.01, 13,786.42 and 5,513.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.01 : 13,786.42 = 5,513.75 : x
2. Step 2: Convert to fraction form
   9,990.01/13,786.42 = 5,513.75/x
3. Step 3: Cross multiply
   9,990.01x = 13,786.42 × 5,513.75
4. Step 4: Simplify right side
   9,990.01x = 76,014,790.56
5. Step 5: Solve for x
   x = 76,014,790.56/9,990.01
6. Step 6: Final answer
   x = 7,609.08