Finding the Fourth Proportional to 1,085.21, 1,496.63 and 851.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.21 : 1,496.63 = 851.93 : x
2. Step 2: Convert to fraction form
   1,085.21/1,496.63 = 851.93/x
3. Step 3: Cross multiply
   1,085.21x = 1,496.63 × 851.93
4. Step 4: Simplify right side
   1,085.21x = 1,275,019.74
5. Step 5: Solve for x
   x = 1,275,019.74/1,085.21
6. Step 6: Final answer
   x = 1,174.91