Finding the Fourth Proportional to 1,418.94, 1,958.28 and 915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.94 : 1,958.28 = 915.12 : x
2. Step 2: Convert to fraction form
   1,418.94/1,958.28 = 915.12/x
3. Step 3: Cross multiply
   1,418.94x = 1,958.28 × 915.12
4. Step 4: Simplify right side
   1,418.94x = 1,792,061.19
5. Step 5: Solve for x
   x = 1,792,061.19/1,418.94
6. Step 6: Final answer
   x = 1,262.96