Finding the Fourth Proportional to 1,520.51, 2,098.27 and 857.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.51 : 2,098.27 = 857.39 : x
2. Step 2: Convert to fraction form
   1,520.51/2,098.27 = 857.39/x
3. Step 3: Cross multiply
   1,520.51x = 2,098.27 × 857.39
4. Step 4: Simplify right side
   1,520.51x = 1,799,031.03
5. Step 5: Solve for x
   x = 1,799,031.03/1,520.51
6. Step 6: Final answer
   x = 1,183.17