Finding the Fourth Proportional to 2,931.47, 4,397.03 and 851.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.47 : 4,397.03 = 851.42 : x
2. Step 2: Convert to fraction form
   2,931.47/4,397.03 = 851.42/x
3. Step 3: Cross multiply
   2,931.47x = 4,397.03 × 851.42
4. Step 4: Simplify right side
   2,931.47x = 3,743,719.28
5. Step 5: Solve for x
   x = 3,743,719.28/2,931.47
6. Step 6: Final answer
   x = 1,277.08