Finding the Fourth Proportional to 2,075.20, 3,105.12 and 1,587.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.20 : 3,105.12 = 1,587.52 : x
2. Step 2: Convert to fraction form
   2,075.20/3,105.12 = 1,587.52/x
3. Step 3: Cross multiply
   2,075.20x = 3,105.12 × 1,587.52
4. Step 4: Simplify right side
   2,075.20x = 4,929,440.10
5. Step 5: Solve for x
   x = 4,929,440.10/2,075.20
6. Step 6: Final answer
   x = 2,375.40