Finding the Fourth Proportional to 21,109.68, 31,664.52 and 5,526

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.68 : 31,664.52 = 5,526 : x
2. Step 2: Convert to fraction form
   21,109.68/31,664.52 = 5,526/x
3. Step 3: Cross multiply
   21,109.68x = 31,664.52 × 5,526
4. Step 4: Simplify right side
   21,109.68x = 174,978,137.52
5. Step 5: Solve for x
   x = 174,978,137.52/21,109.68
6. Step 6: Final answer
   x = 8,289