Finding the Fourth Proportional to 22,900.49, 31,603.86 and 12,828.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,900.49 : 31,603.86 = 12,828.34 : x
2. Step 2: Convert to fraction form
   22,900.49/31,603.86 = 12,828.34/x
3. Step 3: Cross multiply
   22,900.49x = 31,603.86 × 12,828.34
4. Step 4: Simplify right side
   22,900.49x = 405,425,061.39
5. Step 5: Solve for x
   x = 405,425,061.39/22,900.49
6. Step 6: Final answer
   x = 17,703.77