Finding the Fourth Proportional to 1,019.46, 1,530.81 and 854.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.46 : 1,530.81 = 854.76 : x
2. Step 2: Convert to fraction form
   1,019.46/1,530.81 = 854.76/x
3. Step 3: Cross multiply
   1,019.46x = 1,530.81 × 854.76
4. Step 4: Simplify right side
   1,019.46x = 1,308,475.16
5. Step 5: Solve for x
   x = 1,308,475.16/1,019.46
6. Step 6: Final answer
   x = 1,283.50