Finding the Fourth Proportional to 10,820.21, 16,224.51 and 5,553.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,820.21 : 16,224.51 = 5,553.05 : x
2. Step 2: Convert to fraction form
   10,820.21/16,224.51 = 5,553.05/x
3. Step 3: Cross multiply
   10,820.21x = 16,224.51 × 5,553.05
4. Step 4: Simplify right side
   10,820.21x = 90,095,515.26
5. Step 5: Solve for x
   x = 90,095,515.26/10,820.21
6. Step 6: Final answer
   x = 8,326.60