Finding the Fourth Proportional to 9,118.10, 12,794.50 and 9,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.10 : 12,794.50 = 9,118.10 : x
2. Step 2: Convert to fraction form
   9,118.10/12,794.50 = 9,118.10/x
3. Step 3: Cross multiply
   9,118.10x = 12,794.50 × 9,118.10
4. Step 4: Simplify right side
   9,118.10x = 116,661,530.45
5. Step 5: Solve for x
   x = 116,661,530.45/9,118.10
6. Step 6: Final answer
   x = 12,794.50