Finding the Fourth Proportional to 1,520.72, 2,098.16 and 857.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.72 : 2,098.16 = 857.34 : x
2. Step 2: Convert to fraction form
   1,520.72/2,098.16 = 857.34/x
3. Step 3: Cross multiply
   1,520.72x = 2,098.16 × 857.34
4. Step 4: Simplify right side
   1,520.72x = 1,798,836.49
5. Step 5: Solve for x
   x = 1,798,836.49/1,520.72
6. Step 6: Final answer
   x = 1,182.88