Finding the Fourth Proportional to 3,839.69, 5,760.48 and 1,242.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,839.69 : 5,760.48 = 1,242.63 : x
2. Step 2: Convert to fraction form
   3,839.69/5,760.48 = 1,242.63/x
3. Step 3: Cross multiply
   3,839.69x = 5,760.48 × 1,242.63
4. Step 4: Simplify right side
   3,839.69x = 7,158,113.35
5. Step 5: Solve for x
   x = 7,158,113.35/3,839.69
6. Step 6: Final answer
   x = 1,864.24