Finding the Fourth Proportional to 2,280.96, 3,147.93 and 1,286.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.96 : 3,147.93 = 1,286.55 : x
2. Step 2: Convert to fraction form
   2,280.96/3,147.93 = 1,286.55/x
3. Step 3: Cross multiply
   2,280.96x = 3,147.93 × 1,286.55
4. Step 4: Simplify right side
   2,280.96x = 4,049,969.34
5. Step 5: Solve for x
   x = 4,049,969.34/2,280.96
6. Step 6: Final answer
   x = 1,775.55