Finding the Fourth Proportional to 12,402.72, 17,065.74 and 12,107.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.72 : 17,065.74 = 12,107.48 : x
2. Step 2: Convert to fraction form
   12,402.72/17,065.74 = 12,107.48/x
3. Step 3: Cross multiply
   12,402.72x = 17,065.74 × 12,107.48
4. Step 4: Simplify right side
   12,402.72x = 206,622,997.70
5. Step 5: Solve for x
   x = 206,622,997.70/12,402.72
6. Step 6: Final answer
   x = 16,659.49