Finding the Fourth Proportional to 1,630.24, 2,442.57 and 1,285.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,630.24 : 2,442.57 = 1,285.78 : x
2. Step 2: Convert to fraction form
   1,630.24/2,442.57 = 1,285.78/x
3. Step 3: Cross multiply
   1,630.24x = 2,442.57 × 1,285.78
4. Step 4: Simplify right side
   1,630.24x = 3,140,607.65
5. Step 5: Solve for x
   x = 3,140,607.65/1,630.24
6. Step 6: Final answer
   x = 1,926.47