Finding the Fourth Proportional to 2,080.62, 3,117.69 and 1,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.62 : 3,117.69 = 1,309.50 : x
2. Step 2: Convert to fraction form
   2,080.62/3,117.69 = 1,309.50/x
3. Step 3: Cross multiply
   2,080.62x = 3,117.69 × 1,309.50
4. Step 4: Simplify right side
   2,080.62x = 4,082,615.06
5. Step 5: Solve for x
   x = 4,082,615.06/2,080.62
6. Step 6: Final answer
   x = 1,962.21