Finding the Fourth Proportional to 1,418.58, 1,956.69 and 970.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.58 : 1,956.69 = 970.65 : x
2. Step 2: Convert to fraction form
   1,418.58/1,956.69 = 970.65/x
3. Step 3: Cross multiply
   1,418.58x = 1,956.69 × 970.65
4. Step 4: Simplify right side
   1,418.58x = 1,899,261.15
5. Step 5: Solve for x
   x = 1,899,261.15/1,418.58
6. Step 6: Final answer
   x = 1,338.85