Finding the Fourth Proportional to 10,816.10, 16,224.03 and 3,420.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.10 : 16,224.03 = 3,420.55 : x
2. Step 2: Convert to fraction form
   10,816.10/16,224.03 = 3,420.55/x
3. Step 3: Cross multiply
   10,816.10x = 16,224.03 × 3,420.55
4. Step 4: Simplify right side
   10,816.10x = 55,495,126.10
5. Step 5: Solve for x
   x = 55,495,126.10/10,816.10
6. Step 6: Final answer
   x = 5,130.79