Finding the Fourth Proportional to 10,812.42, 16,218.72 and 3,021.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,812.42 : 16,218.72 = 3,021.12 : x
2. Step 2: Convert to fraction form
   10,812.42/16,218.72 = 3,021.12/x
3. Step 3: Cross multiply
   10,812.42x = 16,218.72 × 3,021.12
4. Step 4: Simplify right side
   10,812.42x = 48,998,699.37
5. Step 5: Solve for x
   x = 48,998,699.37/10,812.42
6. Step 6: Final answer
   x = 4,531.71