Finding the Fourth Proportional to 1,141.46, 1,573.78 and 931.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.46 : 1,573.78 = 931.42 : x
2. Step 2: Convert to fraction form
   1,141.46/1,573.78 = 931.42/x
3. Step 3: Cross multiply
   1,141.46x = 1,573.78 × 931.42
4. Step 4: Simplify right side
   1,141.46x = 1,465,851.55
5. Step 5: Solve for x
   x = 1,465,851.55/1,141.46
6. Step 6: Final answer
   x = 1,284.19