Finding the Fourth Proportional to 10,770.72, 16,153.36 and 7,641.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,770.72 : 16,153.36 = 7,641.60 : x
2. Step 2: Convert to fraction form
   10,770.72/16,153.36 = 7,641.60/x
3. Step 3: Cross multiply
   10,770.72x = 16,153.36 × 7,641.60
4. Step 4: Simplify right side
   10,770.72x = 123,437,515.78
5. Step 5: Solve for x
   x = 123,437,515.78/10,770.72
6. Step 6: Final answer
   x = 11,460.47