Finding the Fourth Proportional to 9,083.10, 12,729.30 and 9,083.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,083.10 : 12,729.30 = 9,083.10 : x
2. Step 2: Convert to fraction form
   9,083.10/12,729.30 = 9,083.10/x
3. Step 3: Cross multiply
   9,083.10x = 12,729.30 × 9,083.10
4. Step 4: Simplify right side
   9,083.10x = 115,621,504.83
5. Step 5: Solve for x
   x = 115,621,504.83/9,083.10
6. Step 6: Final answer
   x = 12,729.30