Finding the Fourth Proportional to 2,080.10, 2,870.70 and 1,196.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.10 : 2,870.70 = 1,196.20 : x
2. Step 2: Convert to fraction form
   2,080.10/2,870.70 = 1,196.20/x
3. Step 3: Cross multiply
   2,080.10x = 2,870.70 × 1,196.20
4. Step 4: Simplify right side
   2,080.10x = 3,433,931.34
5. Step 5: Solve for x
   x = 3,433,931.34/2,080.10
6. Step 6: Final answer
   x = 1,650.85