Finding the Fourth Proportional to 2,560.46, 3,837.58 and 1,387.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.46 : 3,837.58 = 1,387.69 : x
2. Step 2: Convert to fraction form
   2,560.46/3,837.58 = 1,387.69/x
3. Step 3: Cross multiply
   2,560.46x = 3,837.58 × 1,387.69
4. Step 4: Simplify right side
   2,560.46x = 5,325,352.20
5. Step 5: Solve for x
   x = 5,325,352.20/2,560.46
6. Step 6: Final answer
   x = 2,079.84