Finding the Fourth Proportional to 1,429.65, 2,141.24 and 851.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.65 : 2,141.24 = 851.31 : x
2. Step 2: Convert to fraction form
   1,429.65/2,141.24 = 851.31/x
3. Step 3: Cross multiply
   1,429.65x = 2,141.24 × 851.31
4. Step 4: Simplify right side
   1,429.65x = 1,822,854.77
5. Step 5: Solve for x
   x = 1,822,854.77/1,429.65
6. Step 6: Final answer
   x = 1,275.04