Finding the Fourth Proportional to 1,325.77, 1,830.17 and 853.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,325.77 : 1,830.17 = 853.89 : x
2. Step 2: Convert to fraction form
   1,325.77/1,830.17 = 853.89/x
3. Step 3: Cross multiply
   1,325.77x = 1,830.17 × 853.89
4. Step 4: Simplify right side
   1,325.77x = 1,562,763.86
5. Step 5: Solve for x
   x = 1,562,763.86/1,325.77
6. Step 6: Final answer
   x = 1,178.76