Finding the Fourth Proportional to 1,418.32, 1,956.50 and 858.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.32 : 1,956.50 = 858.96 : x
2. Step 2: Convert to fraction form
   1,418.32/1,956.50 = 858.96/x
3. Step 3: Cross multiply
   1,418.32x = 1,956.50 × 858.96
4. Step 4: Simplify right side
   1,418.32x = 1,680,555.24
5. Step 5: Solve for x
   x = 1,680,555.24/1,418.32
6. Step 6: Final answer
   x = 1,184.89