Finding the Fourth Proportional to 12,160.52, 16,780.34 and 7,682.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,160.52 : 16,780.34 = 7,682.63 : x
2. Step 2: Convert to fraction form
   12,160.52/16,780.34 = 7,682.63/x
3. Step 3: Cross multiply
   12,160.52x = 16,780.34 × 7,682.63
4. Step 4: Simplify right side
   12,160.52x = 128,917,021.18
5. Step 5: Solve for x
   x = 128,917,021.18/12,160.52
6. Step 6: Final answer
   x = 10,601.28