Finding the Fourth Proportional to 1,515.64, 2,091.59 and 852.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515.64 : 2,091.59 = 852.50 : x
2. Step 2: Convert to fraction form
   1,515.64/2,091.59 = 852.50/x
3. Step 3: Cross multiply
   1,515.64x = 2,091.59 × 852.50
4. Step 4: Simplify right side
   1,515.64x = 1,783,080.48
5. Step 5: Solve for x
   x = 1,783,080.48/1,515.64
6. Step 6: Final answer
   x = 1,176.45