Finding the Fourth Proportional to 10,816.56, 16,224.93 and 3,421.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.56 : 16,224.93 = 3,421.05 : x
2. Step 2: Convert to fraction form
   10,816.56/16,224.93 = 3,421.05/x
3. Step 3: Cross multiply
   10,816.56x = 16,224.93 × 3,421.05
4. Step 4: Simplify right side
   10,816.56x = 55,506,296.78
5. Step 5: Solve for x
   x = 55,506,296.78/10,816.56
6. Step 6: Final answer
   x = 5,131.60