Finding the Fourth Proportional to 13,371.80, 18,453.76 and 7,404.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,371.80 : 18,453.76 = 7,404.12 : x
2. Step 2: Convert to fraction form
   13,371.80/18,453.76 = 7,404.12/x
3. Step 3: Cross multiply
   13,371.80x = 18,453.76 × 7,404.12
4. Step 4: Simplify right side
   13,371.80x = 136,633,834.98
5. Step 5: Solve for x
   x = 136,633,834.98/13,371.80
6. Step 6: Final answer
   x = 10,218.06