Finding the Fourth Proportional to 12,209.10, 16,842.23 and 7,725.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.10 : 16,842.23 = 7,725.14 : x
2. Step 2: Convert to fraction form
   12,209.10/16,842.23 = 7,725.14/x
3. Step 3: Cross multiply
   12,209.10x = 16,842.23 × 7,725.14
4. Step 4: Simplify right side
   12,209.10x = 130,108,553.95
5. Step 5: Solve for x
   x = 130,108,553.95/12,209.10
6. Step 6: Final answer
   x = 10,656.69