Finding the Fourth Proportional to 21,111.94, 29,133.27 and 11,679.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.94 : 29,133.27 = 11,679.94 : x
2. Step 2: Convert to fraction form
   21,111.94/29,133.27 = 11,679.94/x
3. Step 3: Cross multiply
   21,111.94x = 29,133.27 × 11,679.94
4. Step 4: Simplify right side
   21,111.94x = 340,274,845.60
5. Step 5: Solve for x
   x = 340,274,845.60/21,111.94
6. Step 6: Final answer
   x = 16,117.65