Finding the Fourth Proportional to 13,372.84, 18,453.82 and 7,404.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,372.84 : 18,453.82 = 7,404.40 : x
2. Step 2: Convert to fraction form
   13,372.84/18,453.82 = 7,404.40/x
3. Step 3: Cross multiply
   13,372.84x = 18,453.82 × 7,404.40
4. Step 4: Simplify right side
   13,372.84x = 136,639,464.81
5. Step 5: Solve for x
   x = 136,639,464.81/13,372.84
6. Step 6: Final answer
   x = 10,217.68