Finding the Fourth Proportional to 2,075.24, 3,111.60 and 980.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.24 : 3,111.60 = 980.12 : x
2. Step 2: Convert to fraction form
   2,075.24/3,111.60 = 980.12/x
3. Step 3: Cross multiply
   2,075.24x = 3,111.60 × 980.12
4. Step 4: Simplify right side
   2,075.24x = 3,049,741.39
5. Step 5: Solve for x
   x = 3,049,741.39/2,075.24
6. Step 6: Final answer
   x = 1,469.58