Finding the Fourth Proportional to 8,080.49, 11,145.59 and 5,242.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,080.49 : 11,145.59 = 5,242.79 : x
2. Step 2: Convert to fraction form
   8,080.49/11,145.59 = 5,242.79/x
3. Step 3: Cross multiply
   8,080.49x = 11,145.59 × 5,242.79
4. Step 4: Simplify right side
   8,080.49x = 58,434,028.77
5. Step 5: Solve for x
   x = 58,434,028.77/8,080.49
6. Step 6: Final answer
   x = 7,231.49