Finding the Fourth Proportional to 2,185.42, 3,280 and 953.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.42 : 3,280 = 953.82 : x
2. Step 2: Convert to fraction form
   2,185.42/3,280 = 953.82/x
3. Step 3: Cross multiply
   2,185.42x = 3,280 × 953.82
4. Step 4: Simplify right side
   2,185.42x = 3,128,529.60
5. Step 5: Solve for x
   x = 3,128,529.60/2,185.42
6. Step 6: Final answer
   x = 1,431.55