Finding the Fourth Proportional to 1,417.06, 1,955.87 and 857.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.06 : 1,955.87 = 857.55 : x
2. Step 2: Convert to fraction form
   1,417.06/1,955.87 = 857.55/x
3. Step 3: Cross multiply
   1,417.06x = 1,955.87 × 857.55
4. Step 4: Simplify right side
   1,417.06x = 1,677,256.32
5. Step 5: Solve for x
   x = 1,677,256.32/1,417.06
6. Step 6: Final answer
   x = 1,183.62