Finding the Fourth Proportional to 851.31, 1,175.31 and 802.10

Step by Step Solution

1. Step 1: Write the proportion equation
   851.31 : 1,175.31 = 802.10 : x
2. Step 2: Convert to fraction form
   851.31/1,175.31 = 802.10/x
3. Step 3: Cross multiply
   851.31x = 1,175.31 × 802.10
4. Step 4: Simplify right side
   851.31x = 942,719.09
5. Step 5: Solve for x
   x = 942,719.09/851.31
6. Step 6: Final answer
   x = 1,107.37