Finding the Fourth Proportional to 1,561.49, 2,337.33 and 857.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.49 : 2,337.33 = 857.73 : x
2. Step 2: Convert to fraction form
   1,561.49/2,337.33 = 857.73/x
3. Step 3: Cross multiply
   1,561.49x = 2,337.33 × 857.73
4. Step 4: Simplify right side
   1,561.49x = 2,004,798.06
5. Step 5: Solve for x
   x = 2,004,798.06/1,561.49
6. Step 6: Final answer
   x = 1,283.90