Finding the Fourth Proportional to 3,131.56, 4,697.19 and 940.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.56 : 4,697.19 = 940.31 : x
2. Step 2: Convert to fraction form
   3,131.56/4,697.19 = 940.31/x
3. Step 3: Cross multiply
   3,131.56x = 4,697.19 × 940.31
4. Step 4: Simplify right side
   3,131.56x = 4,416,808.86
5. Step 5: Solve for x
   x = 4,416,808.86/3,131.56
6. Step 6: Final answer
   x = 1,410.42