Finding the Fourth Proportional to 3,874.56, 5,810.20 and 1,276.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,874.56 : 5,810.20 = 1,276.88 : x
2. Step 2: Convert to fraction form
   3,874.56/5,810.20 = 1,276.88/x
3. Step 3: Cross multiply
   3,874.56x = 5,810.20 × 1,276.88
4. Step 4: Simplify right side
   3,874.56x = 7,418,928.18
5. Step 5: Solve for x
   x = 7,418,928.18/3,874.56
6. Step 6: Final answer
   x = 1,914.78