Finding the Fourth Proportional to 21,056.96, 29,059.56 and 12,107.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,056.96 : 29,059.56 = 12,107.27 : x
2. Step 2: Convert to fraction form
   21,056.96/29,059.56 = 12,107.27/x
3. Step 3: Cross multiply
   21,056.96x = 29,059.56 × 12,107.27
4. Step 4: Simplify right side
   21,056.96x = 351,832,011.65
5. Step 5: Solve for x
   x = 351,832,011.65/21,056.96
6. Step 6: Final answer
   x = 16,708.58