Finding the Fourth Proportional to 1,056.84, 1,456.54 and 1,009.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.84 : 1,456.54 = 1,009.05 : x
2. Step 2: Convert to fraction form
   1,056.84/1,456.54 = 1,009.05/x
3. Step 3: Cross multiply
   1,056.84x = 1,456.54 × 1,009.05
4. Step 4: Simplify right side
   1,056.84x = 1,469,721.69
5. Step 5: Solve for x
   x = 1,469,721.69/1,056.84
6. Step 6: Final answer
   x = 1,390.68