Finding the Fourth Proportional to 1,417.16, 1,955.64 and 857.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.16 : 1,955.64 = 857.54 : x
2. Step 2: Convert to fraction form
   1,417.16/1,955.64 = 857.54/x
3. Step 3: Cross multiply
   1,417.16x = 1,955.64 × 857.54
4. Step 4: Simplify right side
   1,417.16x = 1,677,039.53
5. Step 5: Solve for x
   x = 1,677,039.53/1,417.16
6. Step 6: Final answer
   x = 1,183.38