Finding the Fourth Proportional to 2,671.86, 4,008.60 and 1,284.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,671.86 : 4,008.60 = 1,284.80 : x
2. Step 2: Convert to fraction form
   2,671.86/4,008.60 = 1,284.80/x
3. Step 3: Cross multiply
   2,671.86x = 4,008.60 × 1,284.80
4. Step 4: Simplify right side
   2,671.86x = 5,150,259.30
5. Step 5: Solve for x
   x = 5,150,259.30/2,671.86
6. Step 6: Final answer
   x = 1,927.59