Finding the Fourth Proportional to 2,758.51, 4,138.54 and 1,116.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.51 : 4,138.54 = 1,116.21 : x
2. Step 2: Convert to fraction form
   2,758.51/4,138.54 = 1,116.21/x
3. Step 3: Cross multiply
   2,758.51x = 4,138.54 × 1,116.21
4. Step 4: Simplify right side
   2,758.51x = 4,619,479.73
5. Step 5: Solve for x
   x = 4,619,479.73/2,758.51
6. Step 6: Final answer
   x = 1,674.63