Finding the Fourth Proportional to 1,016.64, 1,399.50 and 892.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.64 : 1,399.50 = 892.08 : x
2. Step 2: Convert to fraction form
   1,016.64/1,399.50 = 892.08/x
3. Step 3: Cross multiply
   1,016.64x = 1,399.50 × 892.08
4. Step 4: Simplify right side
   1,016.64x = 1,248,465.96
5. Step 5: Solve for x
   x = 1,248,465.96/1,016.64
6. Step 6: Final answer
   x = 1,228.03