Finding the Fourth Proportional to 1,353.94, 2,028.78 and 987.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.94 : 2,028.78 = 987.04 : x
2. Step 2: Convert to fraction form
   1,353.94/2,028.78 = 987.04/x
3. Step 3: Cross multiply
   1,353.94x = 2,028.78 × 987.04
4. Step 4: Simplify right side
   1,353.94x = 2,002,487.01
5. Step 5: Solve for x
   x = 2,002,487.01/1,353.94
6. Step 6: Final answer
   x = 1,479.01