Finding the Fourth Proportional to 12,627.80, 17,425.46 and 7,321.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,627.80 : 17,425.46 = 7,321.72 : x
2. Step 2: Convert to fraction form
   12,627.80/17,425.46 = 7,321.72/x
3. Step 3: Cross multiply
   12,627.80x = 17,425.46 × 7,321.72
4. Step 4: Simplify right side
   12,627.80x = 127,584,338.99
5. Step 5: Solve for x
   x = 127,584,338.99/12,627.80
6. Step 6: Final answer
   x = 10,103.45