Finding the Fourth Proportional to 10,891.72, 16,339.52 and 3,775.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,891.72 : 16,339.52 = 3,775.60 : x
2. Step 2: Convert to fraction form
   10,891.72/16,339.52 = 3,775.60/x
3. Step 3: Cross multiply
   10,891.72x = 16,339.52 × 3,775.60
4. Step 4: Simplify right side
   10,891.72x = 61,691,491.71
5. Step 5: Solve for x
   x = 61,691,491.71/10,891.72
6. Step 6: Final answer
   x = 5,664.07