Finding the Fourth Proportional to 12,389.10, 18,586.74 and 3,624.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.10 : 18,586.74 = 3,624.12 : x
2. Step 2: Convert to fraction form
   12,389.10/18,586.74 = 3,624.12/x
3. Step 3: Cross multiply
   12,389.10x = 18,586.74 × 3,624.12
4. Step 4: Simplify right side
   12,389.10x = 67,360,576.17
5. Step 5: Solve for x
   x = 67,360,576.17/12,389.10
6. Step 6: Final answer
   x = 5,437.08