Finding the Fourth Proportional to 2,116.58, 3,170.23 and 1,074.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.58 : 3,170.23 = 1,074.78 : x
2. Step 2: Convert to fraction form
   2,116.58/3,170.23 = 1,074.78/x
3. Step 3: Cross multiply
   2,116.58x = 3,170.23 × 1,074.78
4. Step 4: Simplify right side
   2,116.58x = 3,407,299.80
5. Step 5: Solve for x
   x = 3,407,299.80/2,116.58
6. Step 6: Final answer
   x = 1,609.81