Finding the Fourth Proportional to 1,515.67, 2,091.71 and 852.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.67 : 2,091.71 = 852.57 : x
2. Step 2: Convert to fraction form
   1,515.67/2,091.71 = 852.57/x
3. Step 3: Cross multiply
   1,515.67x = 2,091.71 × 852.57
4. Step 4: Simplify right side
   1,515.67x = 1,783,329.19
5. Step 5: Solve for x
   x = 1,783,329.19/1,515.67
6. Step 6: Final answer
   x = 1,176.59