Finding the Fourth Proportional to 1,056.82, 1,458.72 and 663.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.82 : 1,458.72 = 663.83 : x
2. Step 2: Convert to fraction form
   1,056.82/1,458.72 = 663.83/x
3. Step 3: Cross multiply
   1,056.82x = 1,458.72 × 663.83
4. Step 4: Simplify right side
   1,056.82x = 968,342.10
5. Step 5: Solve for x
   x = 968,342.10/1,056.82
6. Step 6: Final answer
   x = 916.28