Finding the Fourth Proportional to 12,290.55, 18,433.35 and 3,523.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.55 : 18,433.35 = 3,523.11 : x
2. Step 2: Convert to fraction form
   12,290.55/18,433.35 = 3,523.11/x
3. Step 3: Cross multiply
   12,290.55x = 18,433.35 × 3,523.11
4. Step 4: Simplify right side
   12,290.55x = 64,942,719.72
5. Step 5: Solve for x
   x = 64,942,719.72/12,290.55
6. Step 6: Final answer
   x = 5,283.96