Finding the Fourth Proportional to 1,511.57, 2,086.05 and 881.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,511.57 : 2,086.05 = 881.87 : x
2. Step 2: Convert to fraction form
   1,511.57/2,086.05 = 881.87/x
3. Step 3: Cross multiply
   1,511.57x = 2,086.05 × 881.87
4. Step 4: Simplify right side
   1,511.57x = 1,839,624.91
5. Step 5: Solve for x
   x = 1,839,624.91/1,511.57
6. Step 6: Final answer
   x = 1,217.03