Finding the Fourth Proportional to 1,056.22, 1,456.22 and 724.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.22 : 1,456.22 = 724.05 : x
2. Step 2: Convert to fraction form
   1,056.22/1,456.22 = 724.05/x
3. Step 3: Cross multiply
   1,056.22x = 1,456.22 × 724.05
4. Step 4: Simplify right side
   1,056.22x = 1,054,376.09
5. Step 5: Solve for x
   x = 1,054,376.09/1,056.22
6. Step 6: Final answer
   x = 998.25