Finding the Fourth Proportional to 12,086.78, 16,681.41 and 6,781.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.78 : 16,681.41 = 6,781.91 : x
2. Step 2: Convert to fraction form
   12,086.78/16,681.41 = 6,781.91/x
3. Step 3: Cross multiply
   12,086.78x = 16,681.41 × 6,781.91
4. Step 4: Simplify right side
   12,086.78x = 113,131,737.89
5. Step 5: Solve for x
   x = 113,131,737.89/12,086.78
6. Step 6: Final answer
   x = 9,359.96