Finding the Fourth Proportional to 1,317.12, 1,818.24 and 851.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.12 : 1,818.24 = 851.52 : x
2. Step 2: Convert to fraction form
   1,317.12/1,818.24 = 851.52/x
3. Step 3: Cross multiply
   1,317.12x = 1,818.24 × 851.52
4. Step 4: Simplify right side
   1,317.12x = 1,548,267.72
5. Step 5: Solve for x
   x = 1,548,267.72/1,317.12
6. Step 6: Final answer
   x = 1,175.49