Finding the Fourth Proportional to 12,156.88, 16,776.54 and 7,682.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156.88 : 16,776.54 = 7,682.62 : x
2. Step 2: Convert to fraction form
   12,156.88/16,776.54 = 7,682.62/x
3. Step 3: Cross multiply
   12,156.88x = 16,776.54 × 7,682.62
4. Step 4: Simplify right side
   12,156.88x = 128,887,781.73
5. Step 5: Solve for x
   x = 128,887,781.73/12,156.88
6. Step 6: Final answer
   x = 10,602.04