Finding the Fourth Proportional to 2,065.55, 2,850.40 and 1,121.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.55 : 2,850.40 = 1,121.30 : x
2. Step 2: Convert to fraction form
   2,065.55/2,850.40 = 1,121.30/x
3. Step 3: Cross multiply
   2,065.55x = 2,850.40 × 1,121.30
4. Step 4: Simplify right side
   2,065.55x = 3,196,153.52
5. Step 5: Solve for x
   x = 3,196,153.52/2,065.55
6. Step 6: Final answer
   x = 1,547.36