Finding the Fourth Proportional to 1,127.02, 1,687.22 and 854.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.02 : 1,687.22 = 854.18 : x
2. Step 2: Convert to fraction form
   1,127.02/1,687.22 = 854.18/x
3. Step 3: Cross multiply
   1,127.02x = 1,687.22 × 854.18
4. Step 4: Simplify right side
   1,127.02x = 1,441,185.31
5. Step 5: Solve for x
   x = 1,441,185.31/1,127.02
6. Step 6: Final answer
   x = 1,278.76