Finding the Fourth Proportional to 1,878.16, 2,591.88 and 1,039

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.16 : 2,591.88 = 1,039 : x
2. Step 2: Convert to fraction form
   1,878.16/2,591.88 = 1,039/x
3. Step 3: Cross multiply
   1,878.16x = 2,591.88 × 1,039
4. Step 4: Simplify right side
   1,878.16x = 2,692,963.32
5. Step 5: Solve for x
   x = 2,692,963.32/1,878.16
6. Step 6: Final answer
   x = 1,433.83