Finding the Fourth Proportional to 1,911.08, 2,863.88 and 1,087.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.08 : 2,863.88 = 1,087.61 : x
2. Step 2: Convert to fraction form
   1,911.08/2,863.88 = 1,087.61/x
3. Step 3: Cross multiply
   1,911.08x = 2,863.88 × 1,087.61
4. Step 4: Simplify right side
   1,911.08x = 3,114,764.77
5. Step 5: Solve for x
   x = 3,114,764.77/1,911.08
6. Step 6: Final answer
   x = 1,629.85