Finding the Fourth Proportional to 1,878.48, 2,591.82 and 1,215.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,878.48 : 2,591.82 = 1,215.54 : x
2. Step 2: Convert to fraction form
   1,878.48/2,591.82 = 1,215.54/x
3. Step 3: Cross multiply
   1,878.48x = 2,591.82 × 1,215.54
4. Step 4: Simplify right side
   1,878.48x = 3,150,460.88
5. Step 5: Solve for x
   x = 3,150,460.88/1,878.48
6. Step 6: Final answer
   x = 1,677.13