Finding the Fourth Proportional to 12,290.39, 18,435.53 and 3,525.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.39 : 18,435.53 = 3,525.24 : x
2. Step 2: Convert to fraction form
   12,290.39/18,435.53 = 3,525.24/x
3. Step 3: Cross multiply
   12,290.39x = 18,435.53 × 3,525.24
4. Step 4: Simplify right side
   12,290.39x = 64,989,650.15
5. Step 5: Solve for x
   x = 64,989,650.15/12,290.39
6. Step 6: Final answer
   x = 5,287.84