Finding the Fourth Proportional to 1,015.18, 1,399.71 and 892.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.18 : 1,399.71 = 892.06 : x
2. Step 2: Convert to fraction form
   1,015.18/1,399.71 = 892.06/x
3. Step 3: Cross multiply
   1,015.18x = 1,399.71 × 892.06
4. Step 4: Simplify right side
   1,015.18x = 1,248,625.30
5. Step 5: Solve for x
   x = 1,248,625.30/1,015.18
6. Step 6: Final answer
   x = 1,229.95