Finding the Fourth Proportional to 3,839.77, 5,760.56 and 1,242.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,839.77 : 5,760.56 = 1,242.70 : x
2. Step 2: Convert to fraction form
   3,839.77/5,760.56 = 1,242.70/x
3. Step 3: Cross multiply
   3,839.77x = 5,760.56 × 1,242.70
4. Step 4: Simplify right side
   3,839.77x = 7,158,669.02
5. Step 5: Solve for x
   x = 7,158,669.02/3,839.77
6. Step 6: Final answer
   x = 1,864.35