Finding the Fourth Proportional to 2,152.34, 3,229.47 and 853.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.34 : 3,229.47 = 853.46 : x
2. Step 2: Convert to fraction form
   2,152.34/3,229.47 = 853.46/x
3. Step 3: Cross multiply
   2,152.34x = 3,229.47 × 853.46
4. Step 4: Simplify right side
   2,152.34x = 2,756,223.47
5. Step 5: Solve for x
   x = 2,756,223.47/2,152.34
6. Step 6: Final answer
   x = 1,280.57