Finding the Fourth Proportional to 1,028.46, 1,428.84 and 1,016.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.46 : 1,428.84 = 1,016.15 : x
2. Step 2: Convert to fraction form
   1,028.46/1,428.84 = 1,016.15/x
3. Step 3: Cross multiply
   1,028.46x = 1,428.84 × 1,016.15
4. Step 4: Simplify right side
   1,028.46x = 1,451,915.77
5. Step 5: Solve for x
   x = 1,451,915.77/1,028.46
6. Step 6: Final answer
   x = 1,411.74