Finding the Fourth Proportional to 2,651.56, 3,977.30 and 1,007.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.56 : 3,977.30 = 1,007.80 : x
2. Step 2: Convert to fraction form
   2,651.56/3,977.30 = 1,007.80/x
3. Step 3: Cross multiply
   2,651.56x = 3,977.30 × 1,007.80
4. Step 4: Simplify right side
   2,651.56x = 4,008,322.94
5. Step 5: Solve for x
   x = 4,008,322.94/2,651.56
6. Step 6: Final answer
   x = 1,511.68