Finding the Fourth Proportional to 1,351.37, 1,864.77 and 853.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.37 : 1,864.77 = 853.83 : x
2. Step 2: Convert to fraction form
   1,351.37/1,864.77 = 853.83/x
3. Step 3: Cross multiply
   1,351.37x = 1,864.77 × 853.83
4. Step 4: Simplify right side
   1,351.37x = 1,592,196.57
5. Step 5: Solve for x
   x = 1,592,196.57/1,351.37
6. Step 6: Final answer
   x = 1,178.21