Finding the Fourth Proportional to 1,906.55, 2,858.17 and 851.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.55 : 2,858.17 = 851.57 : x
2. Step 2: Convert to fraction form
   1,906.55/2,858.17 = 851.57/x
3. Step 3: Cross multiply
   1,906.55x = 2,858.17 × 851.57
4. Step 4: Simplify right side
   1,906.55x = 2,433,931.83
5. Step 5: Solve for x
   x = 2,433,931.83/1,906.55
6. Step 6: Final answer
   x = 1,276.62