Finding the Fourth Proportional to 9,140.85, 12,613.59 and 5,161.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,140.85 : 12,613.59 = 5,161.59 : x
2. Step 2: Convert to fraction form
   9,140.85/12,613.59 = 5,161.59/x
3. Step 3: Cross multiply
   9,140.85x = 12,613.59 × 5,161.59
4. Step 4: Simplify right side
   9,140.85x = 65,106,180.01
5. Step 5: Solve for x
   x = 65,106,180.01/9,140.85
6. Step 6: Final answer
   x = 7,122.55