Finding the Fourth Proportional to 22,900.05, 31,604.31 and 12,828.51

Step by Step Solution

1. Step 1: Write the proportion equation
   22,900.05 : 31,604.31 = 12,828.51 : x
2. Step 2: Convert to fraction form
   22,900.05/31,604.31 = 12,828.51/x
3. Step 3: Cross multiply
   22,900.05x = 31,604.31 × 12,828.51
4. Step 4: Simplify right side
   22,900.05x = 405,436,206.88
5. Step 5: Solve for x
   x = 405,436,206.88/22,900.05
6. Step 6: Final answer
   x = 17,704.60