Finding the Fourth Proportional to 1,017.94, 1,529.90 and 845.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.94 : 1,529.90 = 845.72 : x
2. Step 2: Convert to fraction form
   1,017.94/1,529.90 = 845.72/x
3. Step 3: Cross multiply
   1,017.94x = 1,529.90 × 845.72
4. Step 4: Simplify right side
   1,017.94x = 1,293,867.03
5. Step 5: Solve for x
   x = 1,293,867.03/1,017.94
6. Step 6: Final answer
   x = 1,271.06