Finding the Fourth Proportional to 2,075.70, 3,113.69 and 843.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.70 : 3,113.69 = 843.10 : x
2. Step 2: Convert to fraction form
   2,075.70/3,113.69 = 843.10/x
3. Step 3: Cross multiply
   2,075.70x = 3,113.69 × 843.10
4. Step 4: Simplify right side
   2,075.70x = 2,625,152.04
5. Step 5: Solve for x
   x = 2,625,152.04/2,075.70
6. Step 6: Final answer
   x = 1,264.71