Finding the Fourth Proportional to 22,554.73, 31,128.83 and 12,992.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,554.73 : 31,128.83 = 12,992.76 : x
2. Step 2: Convert to fraction form
   22,554.73/31,128.83 = 12,992.76/x
3. Step 3: Cross multiply
   22,554.73x = 31,128.83 × 12,992.76
4. Step 4: Simplify right side
   22,554.73x = 404,449,401.03
5. Step 5: Solve for x
   x = 404,449,401.03/22,554.73
6. Step 6: Final answer
   x = 17,931.91