Finding the Fourth Proportional to 16,887.72, 23,289.90 and 10,913.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,887.72 : 23,289.90 = 10,913.10 : x
2. Step 2: Convert to fraction form
   16,887.72/23,289.90 = 10,913.10/x
3. Step 3: Cross multiply
   16,887.72x = 23,289.90 × 10,913.10
4. Step 4: Simplify right side
   16,887.72x = 254,165,007.69
5. Step 5: Solve for x
   x = 254,165,007.69/16,887.72
6. Step 6: Final answer
   x = 15,050.29