Finding the Fourth Proportional to 9,379.76, 12,906.38 and 9,056.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.76 : 12,906.38 = 9,056.56 : x
2. Step 2: Convert to fraction form
   9,379.76/12,906.38 = 9,056.56/x
3. Step 3: Cross multiply
   9,379.76x = 12,906.38 × 9,056.56
4. Step 4: Simplify right side
   9,379.76x = 116,887,404.85
5. Step 5: Solve for x
   x = 116,887,404.85/9,379.76
6. Step 6: Final answer
   x = 12,461.66