Finding the Fourth Proportional to 21,062.25, 29,069.82 and 12,109.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062.25 : 29,069.82 = 12,109.86 : x
2. Step 2: Convert to fraction form
   21,062.25/29,069.82 = 12,109.86/x
3. Step 3: Cross multiply
   21,062.25x = 29,069.82 × 12,109.86
4. Step 4: Simplify right side
   21,062.25x = 352,031,450.43
5. Step 5: Solve for x
   x = 352,031,450.43/21,062.25
6. Step 6: Final answer
   x = 16,713.86