Finding the Fourth Proportional to 1,417.21, 1,955.88 and 857.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.21 : 1,955.88 = 857.82 : x
2. Step 2: Convert to fraction form
   1,417.21/1,955.88 = 857.82/x
3. Step 3: Cross multiply
   1,417.21x = 1,955.88 × 857.82
4. Step 4: Simplify right side
   1,417.21x = 1,677,792.98
5. Step 5: Solve for x
   x = 1,677,792.98/1,417.21
6. Step 6: Final answer
   x = 1,183.87