Finding the Fourth Proportional to 1,515.87, 2,091.89 and 852.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.87 : 2,091.89 = 852.71 : x
2. Step 2: Convert to fraction form
   1,515.87/2,091.89 = 852.71/x
3. Step 3: Cross multiply
   1,515.87x = 2,091.89 × 852.71
4. Step 4: Simplify right side
   1,515.87x = 1,783,778.96
5. Step 5: Solve for x
   x = 1,783,778.96/1,515.87
6. Step 6: Final answer
   x = 1,176.74