Finding the Fourth Proportional to 2,508.57, 3,764.28 and 1,276.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.57 : 3,764.28 = 1,276.05 : x
2. Step 2: Convert to fraction form
   2,508.57/3,764.28 = 1,276.05/x
3. Step 3: Cross multiply
   2,508.57x = 3,764.28 × 1,276.05
4. Step 4: Simplify right side
   2,508.57x = 4,803,409.49
5. Step 5: Solve for x
   x = 4,803,409.49/2,508.57
6. Step 6: Final answer
   x = 1,914.80