Finding the Fourth Proportional to 12,290.56, 18,439.04 and 3,526.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290.56 : 18,439.04 = 3,526.16 : x
2. Step 2: Convert to fraction form
   12,290.56/18,439.04 = 3,526.16/x
3. Step 3: Cross multiply
   12,290.56x = 18,439.04 × 3,526.16
4. Step 4: Simplify right side
   12,290.56x = 65,019,005.29
5. Step 5: Solve for x
   x = 65,019,005.29/12,290.56
6. Step 6: Final answer
   x = 5,290.16