Finding the Fourth Proportional to 21,267.05, 31,903.50 and 7,223.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,267.05 : 31,903.50 = 7,223.31 : x
2. Step 2: Convert to fraction form
   21,267.05/31,903.50 = 7,223.31/x
3. Step 3: Cross multiply
   21,267.05x = 31,903.50 × 7,223.31
4. Step 4: Simplify right side
   21,267.05x = 230,448,818.31
5. Step 5: Solve for x
   x = 230,448,818.31/21,267.05
6. Step 6: Final answer
   x = 10,835.95