Finding the Fourth Proportional to 10,999.48, 16,494.72 and 5,450.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.48 : 16,494.72 = 5,450.80 : x
2. Step 2: Convert to fraction form
   10,999.48/16,494.72 = 5,450.80/x
3. Step 3: Cross multiply
   10,999.48x = 16,494.72 × 5,450.80
4. Step 4: Simplify right side
   10,999.48x = 89,909,419.78
5. Step 5: Solve for x
   x = 89,909,419.78/10,999.48
6. Step 6: Final answer
   x = 8,173.97