Finding the Fourth Proportional to 9,104.80, 12,764 and 9,104.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,104.80 : 12,764 = 9,104.80 : x
2. Step 2: Convert to fraction form
   9,104.80/12,764 = 9,104.80/x
3. Step 3: Cross multiply
   9,104.80x = 12,764 × 9,104.80
4. Step 4: Simplify right side
   9,104.80x = 116,213,667.20
5. Step 5: Solve for x
   x = 116,213,667.20/9,104.80
6. Step 6: Final answer
   x = 12,764