Finding the Fourth Proportional to 21,064.33, 29,071.25 and 12,112.21

Step by Step Solution

1. Step 1: Write the proportion equation
   21,064.33 : 29,071.25 = 12,112.21 : x
2. Step 2: Convert to fraction form
   21,064.33/29,071.25 = 12,112.21/x
3. Step 3: Cross multiply
   21,064.33x = 29,071.25 × 12,112.21
4. Step 4: Simplify right side
   21,064.33x = 352,117,084.96
5. Step 5: Solve for x
   x = 352,117,084.96/21,064.33
6. Step 6: Final answer
   x = 16,716.27