Finding the Fourth Proportional to 10,899.86, 16,352.63 and 3,109.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,899.86 : 16,352.63 = 3,109.28 : x
2. Step 2: Convert to fraction form
   10,899.86/16,352.63 = 3,109.28/x
3. Step 3: Cross multiply
   10,899.86x = 16,352.63 × 3,109.28
4. Step 4: Simplify right side
   10,899.86x = 50,844,889.86
5. Step 5: Solve for x
   x = 50,844,889.86/10,899.86
6. Step 6: Final answer
   x = 4,664.73