Finding the Fourth Proportional to 3,424.96, 5,138.20 and 1,085.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,424.96 : 5,138.20 = 1,085.10 : x
2. Step 2: Convert to fraction form
   3,424.96/5,138.20 = 1,085.10/x
3. Step 3: Cross multiply
   3,424.96x = 5,138.20 × 1,085.10
4. Step 4: Simplify right side
   3,424.96x = 5,575,460.82
5. Step 5: Solve for x
   x = 5,575,460.82/3,424.96
6. Step 6: Final answer
   x = 1,627.89