Finding the Fourth Proportional to 7,085.10, 10,627.20 and 2,405.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.10 : 10,627.20 = 2,405.10 : x
2. Step 2: Convert to fraction form
   7,085.10/10,627.20 = 2,405.10/x
3. Step 3: Cross multiply
   7,085.10x = 10,627.20 × 2,405.10
4. Step 4: Simplify right side
   7,085.10x = 25,559,478.72
5. Step 5: Solve for x
   x = 25,559,478.72/7,085.10
6. Step 6: Final answer
   x = 3,607.50