Finding the Fourth Proportional to 1,878.15, 2,591.61 and 1,081.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.15 : 2,591.61 = 1,081.49 : x
2. Step 2: Convert to fraction form
   1,878.15/2,591.61 = 1,081.49/x
3. Step 3: Cross multiply
   1,878.15x = 2,591.61 × 1,081.49
4. Step 4: Simplify right side
   1,878.15x = 2,802,787.34
5. Step 5: Solve for x
   x = 2,802,787.34/1,878.15
6. Step 6: Final answer
   x = 1,492.31