Finding the Fourth Proportional to 10,789.86, 16,185.60 and 2,999.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,789.86 : 16,185.60 = 2,999.28 : x
2. Step 2: Convert to fraction form
   10,789.86/16,185.60 = 2,999.28/x
3. Step 3: Cross multiply
   10,789.86x = 16,185.60 × 2,999.28
4. Step 4: Simplify right side
   10,789.86x = 48,545,146.37
5. Step 5: Solve for x
   x = 48,545,146.37/10,789.86
6. Step 6: Final answer
   x = 4,499.15