Finding the Fourth Proportional to 21,900, 32,843.04 and 7,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,900 : 32,843.04 = 7,105.50 : x
2. Step 2: Convert to fraction form
   21,900/32,843.04 = 7,105.50/x
3. Step 3: Cross multiply
   21,900x = 32,843.04 × 7,105.50
4. Step 4: Simplify right side
   21,900x = 233,366,220.72
5. Step 5: Solve for x
   x = 233,366,220.72/21,900
6. Step 6: Final answer
   x = 10,655.99