Finding the Fourth Proportional to 1,029.10, 1,418.71 and 851.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,029.10 : 1,418.71 = 851.31 : x
2. Step 2: Convert to fraction form
   1,029.10/1,418.71 = 851.31/x
3. Step 3: Cross multiply
   1,029.10x = 1,418.71 × 851.31
4. Step 4: Simplify right side
   1,029.10x = 1,207,762.01
5. Step 5: Solve for x
   x = 1,207,762.01/1,029.10
6. Step 6: Final answer
   x = 1,173.61