Finding the Fourth Proportional to 1,382.69, 1,906.64 and 1,028.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.69 : 1,906.64 = 1,028.04 : x
2. Step 2: Convert to fraction form
   1,382.69/1,906.64 = 1,028.04/x
3. Step 3: Cross multiply
   1,382.69x = 1,906.64 × 1,028.04
4. Step 4: Simplify right side
   1,382.69x = 1,960,097.61
5. Step 5: Solve for x
   x = 1,960,097.61/1,382.69
6. Step 6: Final answer
   x = 1,417.60