Finding the Fourth Proportional to 1,317.25, 1,817.83 and 852.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.25 : 1,817.83 = 852.31 : x
2. Step 2: Convert to fraction form
   1,317.25/1,817.83 = 852.31/x
3. Step 3: Cross multiply
   1,317.25x = 1,817.83 × 852.31
4. Step 4: Simplify right side
   1,317.25x = 1,549,354.69
5. Step 5: Solve for x
   x = 1,549,354.69/1,317.25
6. Step 6: Final answer
   x = 1,176.20