Finding the Fourth Proportional to 1,276.77, 1,760.55 and 1,109.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.77 : 1,760.55 = 1,109.51 : x
2. Step 2: Convert to fraction form
   1,276.77/1,760.55 = 1,109.51/x
3. Step 3: Cross multiply
   1,276.77x = 1,760.55 × 1,109.51
4. Step 4: Simplify right side
   1,276.77x = 1,953,339.03
5. Step 5: Solve for x
   x = 1,953,339.03/1,276.77
6. Step 6: Final answer
   x = 1,529.91