Finding the Fourth Proportional to 9,140.05, 12,613.50 and 5,605.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,140.05 : 12,613.50 = 5,605.21 : x
2. Step 2: Convert to fraction form
   9,140.05/12,613.50 = 5,605.21/x
3. Step 3: Cross multiply
   9,140.05x = 12,613.50 × 5,605.21
4. Step 4: Simplify right side
   9,140.05x = 70,701,225.24
5. Step 5: Solve for x
   x = 70,701,225.24/9,140.05
6. Step 6: Final answer
   x = 7,735.33