Finding the Fourth Proportional to 1,442.46, 1,992.52 and 1,285.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.46 : 1,992.52 = 1,285.72 : x
2. Step 2: Convert to fraction form
   1,442.46/1,992.52 = 1,285.72/x
3. Step 3: Cross multiply
   1,442.46x = 1,992.52 × 1,285.72
4. Step 4: Simplify right side
   1,442.46x = 2,561,822.81
5. Step 5: Solve for x
   x = 2,561,822.81/1,442.46
6. Step 6: Final answer
   x = 1,776.01