Finding the Fourth Proportional to 1,437.82, 2,155.43 and 851.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.82 : 2,155.43 = 851.38 : x
2. Step 2: Convert to fraction form
   1,437.82/2,155.43 = 851.38/x
3. Step 3: Cross multiply
   1,437.82x = 2,155.43 × 851.38
4. Step 4: Simplify right side
   1,437.82x = 1,835,086.73
5. Step 5: Solve for x
   x = 1,835,086.73/1,437.82
6. Step 6: Final answer
   x = 1,276.30