Finding the Fourth Proportional to 9,269.09, 12,791.20 and 5,290.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,269.09 : 12,791.20 = 5,290.10 : x
2. Step 2: Convert to fraction form
   9,269.09/12,791.20 = 5,290.10/x
3. Step 3: Cross multiply
   9,269.09x = 12,791.20 × 5,290.10
4. Step 4: Simplify right side
   9,269.09x = 67,666,727.12
5. Step 5: Solve for x
   x = 67,666,727.12/9,269.09
6. Step 6: Final answer
   x = 7,300.26