Finding the Fourth Proportional to 3,840.32, 5,758.56 and 1,242.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,840.32 : 5,758.56 = 1,242.56 : x
2. Step 2: Convert to fraction form
   3,840.32/5,758.56 = 1,242.56/x
3. Step 3: Cross multiply
   3,840.32x = 5,758.56 × 1,242.56
4. Step 4: Simplify right side
   3,840.32x = 7,155,356.31
5. Step 5: Solve for x
   x = 7,155,356.31/3,840.32
6. Step 6: Final answer
   x = 1,863.22