Finding the Fourth Proportional to 2,003.92, 3,008.60 and 1,276.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.92 : 3,008.60 = 1,276.80 : x
2. Step 2: Convert to fraction form
   2,003.92/3,008.60 = 1,276.80/x
3. Step 3: Cross multiply
   2,003.92x = 3,008.60 × 1,276.80
4. Step 4: Simplify right side
   2,003.92x = 3,841,380.48
5. Step 5: Solve for x
   x = 3,841,380.48/2,003.92
6. Step 6: Final answer
   x = 1,916.93