Finding the Fourth Proportional to 2,763.39, 4,145.90 and 1,121.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,763.39 : 4,145.90 = 1,121.12 : x
2. Step 2: Convert to fraction form
   2,763.39/4,145.90 = 1,121.12/x
3. Step 3: Cross multiply
   2,763.39x = 4,145.90 × 1,121.12
4. Step 4: Simplify right side
   2,763.39x = 4,648,025.07
5. Step 5: Solve for x
   x = 4,648,025.07/2,763.39
6. Step 6: Final answer
   x = 1,682.00