Finding the Fourth Proportional to 2,145.64, 3,219.10 and 1,233

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.64 : 3,219.10 = 1,233 : x
2. Step 2: Convert to fraction form
   2,145.64/3,219.10 = 1,233/x
3. Step 3: Cross multiply
   2,145.64x = 3,219.10 × 1,233
4. Step 4: Simplify right side
   2,145.64x = 3,969,150.30
5. Step 5: Solve for x
   x = 3,969,150.30/2,145.64
6. Step 6: Final answer
   x = 1,849.87