Finding the Fourth Proportional to 10,816.82, 16,230.28 and 10,642.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.82 : 16,230.28 = 10,642.10 : x
2. Step 2: Convert to fraction form
   10,816.82/16,230.28 = 10,642.10/x
3. Step 3: Cross multiply
   10,816.82x = 16,230.28 × 10,642.10
4. Step 4: Simplify right side
   10,816.82x = 172,724,262.79
5. Step 5: Solve for x
   x = 172,724,262.79/10,816.82
6. Step 6: Final answer
   x = 15,968.12