Finding the Fourth Proportional to 3,131.42, 4,693.06 and 1,280.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.42 : 4,693.06 = 1,280.42 : x
2. Step 2: Convert to fraction form
   3,131.42/4,693.06 = 1,280.42/x
3. Step 3: Cross multiply
   3,131.42x = 4,693.06 × 1,280.42
4. Step 4: Simplify right side
   3,131.42x = 6,009,087.89
5. Step 5: Solve for x
   x = 6,009,087.89/3,131.42
6. Step 6: Final answer
   x = 1,918.97