Finding the Fourth Proportional to 9,990.04, 13,786.71 and 5,742.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.04 : 13,786.71 = 5,742.48 : x
2. Step 2: Convert to fraction form
   9,990.04/13,786.71 = 5,742.48/x
3. Step 3: Cross multiply
   9,990.04x = 13,786.71 × 5,742.48
4. Step 4: Simplify right side
   9,990.04x = 79,169,877.73
5. Step 5: Solve for x
   x = 79,169,877.73/9,990.04
6. Step 6: Final answer
   x = 7,924.88