Finding the Fourth Proportional to 1,425.56, 1,959.72 and 1,225.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.56 : 1,959.72 = 1,225.65 : x
2. Step 2: Convert to fraction form
   1,425.56/1,959.72 = 1,225.65/x
3. Step 3: Cross multiply
   1,425.56x = 1,959.72 × 1,225.65
4. Step 4: Simplify right side
   1,425.56x = 2,401,929.44
5. Step 5: Solve for x
   x = 2,401,929.44/1,425.56
6. Step 6: Final answer
   x = 1,684.91