Finding the Fourth Proportional to 9,519.72, 13,144.14 and 7,641.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,519.72 : 13,144.14 = 7,641.63 : x
2. Step 2: Convert to fraction form
   9,519.72/13,144.14 = 7,641.63/x
3. Step 3: Cross multiply
   9,519.72x = 13,144.14 × 7,641.63
4. Step 4: Simplify right side
   9,519.72x = 100,442,654.55
5. Step 5: Solve for x
   x = 100,442,654.55/9,519.72
6. Step 6: Final answer
   x = 10,551.01