Finding the Fourth Proportional to 21,673.73, 29,906.74 and 12,112.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,673.73 : 29,906.74 = 12,112.45 : x
2. Step 2: Convert to fraction form
   21,673.73/29,906.74 = 12,112.45/x
3. Step 3: Cross multiply
   21,673.73x = 29,906.74 × 12,112.45
4. Step 4: Simplify right side
   21,673.73x = 362,243,892.91
5. Step 5: Solve for x
   x = 362,243,892.91/21,673.73
6. Step 6: Final answer
   x = 16,713.50