Finding the Fourth Proportional to 3,131.78, 4,698.57 and 940.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.78 : 4,698.57 = 940.52 : x
2. Step 2: Convert to fraction form
   3,131.78/4,698.57 = 940.52/x
3. Step 3: Cross multiply
   3,131.78x = 4,698.57 × 940.52
4. Step 4: Simplify right side
   3,131.78x = 4,419,075.56
5. Step 5: Solve for x
   x = 4,419,075.56/3,131.78
6. Step 6: Final answer
   x = 1,411.05