Finding the Fourth Proportional to 12,469.72, 17,205.96 and 10,107.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,469.72 : 17,205.96 = 10,107.76 : x
2. Step 2: Convert to fraction form
   12,469.72/17,205.96 = 10,107.76/x
3. Step 3: Cross multiply
   12,469.72x = 17,205.96 × 10,107.76
4. Step 4: Simplify right side
   12,469.72x = 173,913,714.25
5. Step 5: Solve for x
   x = 173,913,714.25/12,469.72
6. Step 6: Final answer
   x = 13,946.88