Finding the Fourth Proportional to 2,756.77, 4,131.68 and 1,112.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,756.77 : 4,131.68 = 1,112.40 : x
2. Step 2: Convert to fraction form
   2,756.77/4,131.68 = 1,112.40/x
3. Step 3: Cross multiply
   2,756.77x = 4,131.68 × 1,112.40
4. Step 4: Simplify right side
   2,756.77x = 4,596,075.27
5. Step 5: Solve for x
   x = 4,596,075.27/2,756.77
6. Step 6: Final answer
   x = 1,667.20