Finding the Fourth Proportional to 1,440.78, 1,981.98 and 1,262.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.78 : 1,981.98 = 1,262.94 : x
2. Step 2: Convert to fraction form
   1,440.78/1,981.98 = 1,262.94/x
3. Step 3: Cross multiply
   1,440.78x = 1,981.98 × 1,262.94
4. Step 4: Simplify right side
   1,440.78x = 2,503,121.82
5. Step 5: Solve for x
   x = 2,503,121.82/1,440.78
6. Step 6: Final answer
   x = 1,737.34