Finding the Fourth Proportional to 2,931.51, 4,397.94 and 851.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.51 : 4,397.94 = 851.55 : x
2. Step 2: Convert to fraction form
   2,931.51/4,397.94 = 851.55/x
3. Step 3: Cross multiply
   2,931.51x = 4,397.94 × 851.55
4. Step 4: Simplify right side
   2,931.51x = 3,745,065.81
5. Step 5: Solve for x
   x = 3,745,065.81/2,931.51
6. Step 6: Final answer
   x = 1,277.52