Finding the Fourth Proportional to 12,620.34, 17,404.25 and 9,974.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,620.34 : 17,404.25 = 9,974.07 : x
2. Step 2: Convert to fraction form
   12,620.34/17,404.25 = 9,974.07/x
3. Step 3: Cross multiply
   12,620.34x = 17,404.25 × 9,974.07
4. Step 4: Simplify right side
   12,620.34x = 173,591,207.80
5. Step 5: Solve for x
   x = 173,591,207.80/12,620.34
6. Step 6: Final answer
   x = 13,754.88