Finding the Fourth Proportional to 1,515.31, 2,091.24 and 852.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.31 : 2,091.24 = 852.22 : x
2. Step 2: Convert to fraction form
   1,515.31/2,091.24 = 852.22/x
3. Step 3: Cross multiply
   1,515.31x = 2,091.24 × 852.22
4. Step 4: Simplify right side
   1,515.31x = 1,782,196.55
5. Step 5: Solve for x
   x = 1,782,196.55/1,515.31
6. Step 6: Final answer
   x = 1,176.13