Finding the Fourth Proportional to 2,185.87, 3,280.34 and 953.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.87 : 3,280.34 = 953.63 : x
2. Step 2: Convert to fraction form
   2,185.87/3,280.34 = 953.63/x
3. Step 3: Cross multiply
   2,185.87x = 3,280.34 × 953.63
4. Step 4: Simplify right side
   2,185.87x = 3,128,235.46
5. Step 5: Solve for x
   x = 3,128,235.46/2,185.87
6. Step 6: Final answer
   x = 1,431.12