Finding the Fourth Proportional to 2,075.61, 3,113.55 and 843.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.61 : 3,113.55 = 843.60 : x
2. Step 2: Convert to fraction form
   2,075.61/3,113.55 = 843.60/x
3. Step 3: Cross multiply
   2,075.61x = 3,113.55 × 843.60
4. Step 4: Simplify right side
   2,075.61x = 2,626,590.78
5. Step 5: Solve for x
   x = 2,626,590.78/2,075.61
6. Step 6: Final answer
   x = 1,265.45