Finding the Fourth Proportional to 1,056.19, 1,456.71 and 724.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.19 : 1,456.71 = 724.09 : x
2. Step 2: Convert to fraction form
   1,056.19/1,456.71 = 724.09/x
3. Step 3: Cross multiply
   1,056.19x = 1,456.71 × 724.09
4. Step 4: Simplify right side
   1,056.19x = 1,054,789.14
5. Step 5: Solve for x
   x = 1,054,789.14/1,056.19
6. Step 6: Final answer
   x = 998.67