Finding the Fourth Proportional to 2,425.78, 3,636.18 and 1,383.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,425.78 : 3,636.18 = 1,383.65 : x
2. Step 2: Convert to fraction form
   2,425.78/3,636.18 = 1,383.65/x
3. Step 3: Cross multiply
   2,425.78x = 3,636.18 × 1,383.65
4. Step 4: Simplify right side
   2,425.78x = 5,031,200.46
5. Step 5: Solve for x
   x = 5,031,200.46/2,425.78
6. Step 6: Final answer
   x = 2,074.05