Finding the Fourth Proportional to 2,080.40, 2,870.90 and 1,196.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.40 : 2,870.90 = 1,196.18 : x
2. Step 2: Convert to fraction form
   2,080.40/2,870.90 = 1,196.18/x
3. Step 3: Cross multiply
   2,080.40x = 2,870.90 × 1,196.18
4. Step 4: Simplify right side
   2,080.40x = 3,434,113.16
5. Step 5: Solve for x
   x = 3,434,113.16/2,080.40
6. Step 6: Final answer
   x = 1,650.70