Finding the Fourth Proportional to 12,399.49, 18,574.56 and 9,074.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,399.49 : 18,574.56 = 9,074.74 : x
2. Step 2: Convert to fraction form
   12,399.49/18,574.56 = 9,074.74/x
3. Step 3: Cross multiply
   12,399.49x = 18,574.56 × 9,074.74
4. Step 4: Simplify right side
   12,399.49x = 168,559,302.61
5. Step 5: Solve for x
   x = 168,559,302.61/12,399.49
6. Step 6: Final answer
   x = 13,594.05