Finding the Fourth Proportional to 2,931.61, 4,397.69 and 851.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.61 : 4,397.69 = 851.53 : x
2. Step 2: Convert to fraction form
   2,931.61/4,397.69 = 851.53/x
3. Step 3: Cross multiply
   2,931.61x = 4,397.69 × 851.53
4. Step 4: Simplify right side
   2,931.61x = 3,744,760.71
5. Step 5: Solve for x
   x = 3,744,760.71/2,931.61
6. Step 6: Final answer
   x = 1,277.37