Finding the Fourth Proportional to 8,845.34, 12,127.46 and 8,687.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,845.34 : 12,127.46 = 8,687.39 : x
2. Step 2: Convert to fraction form
   8,845.34/12,127.46 = 8,687.39/x
3. Step 3: Cross multiply
   8,845.34x = 12,127.46 × 8,687.39
4. Step 4: Simplify right side
   8,845.34x = 105,355,870.66
5. Step 5: Solve for x
   x = 105,355,870.66/8,845.34
6. Step 6: Final answer
   x = 11,910.90