Finding the Fourth Proportional to 8,926.86, 12,372.51 and 8,760.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,926.86 : 12,372.51 = 8,760.90 : x
2. Step 2: Convert to fraction form
   8,926.86/12,372.51 = 8,760.90/x
3. Step 3: Cross multiply
   8,926.86x = 12,372.51 × 8,760.90
4. Step 4: Simplify right side
   8,926.86x = 108,394,322.86
5. Step 5: Solve for x
   x = 108,394,322.86/8,926.86
6. Step 6: Final answer
   x = 12,142.49