Finding the Fourth Proportional to 2,280.71, 3,147.45 and 1,286.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.71 : 3,147.45 = 1,286.03 : x
2. Step 2: Convert to fraction form
   2,280.71/3,147.45 = 1,286.03/x
3. Step 3: Cross multiply
   2,280.71x = 3,147.45 × 1,286.03
4. Step 4: Simplify right side
   2,280.71x = 4,047,715.12
5. Step 5: Solve for x
   x = 4,047,715.12/2,280.71
6. Step 6: Final answer
   x = 1,774.76